Re: F M J Body Cars . . .
[Re: bremotorsports]
#3049389
06/10/22 11:22 AM
06/10/22 11:22 AM
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Joined: Jan 2003
Posts: 18,048 S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 18,048
S.E. Michigan
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I had a '76 Aspen that been overheated badly and the original 318 was junk/barely ran. I swapped a '68 318 in. (engine came from a free '68 Satellite). It was metallic black 2 door. I worked really hard on it, but in the end I just didn't like driving the car very much. Looking back, it seems like the suspension felt driving a bowl of oatmeal, or maybe the chassis was super flexible, or something like that. I drove it for about two weeks and put it up for sale. If I did one again it would have to be built up more, at least a 360 if not a big block, and the mushy suspension would have to go.
I still like the way the Aspen/Volare 2 door looks, and think they look especially great as a street/strip or drag car when all done up. They did a nice job on the styling of those.
Later I got an '83 5th Avenue, it had well over 200,000mi on it but ran halfway decent, and I actually enjoyed driving it for a few years until I started hauling PA for my band and it was too small for that. I did a bunch of maintenence to make sure it wouldn't die (timing chain, de-sludged the lifter valley, de-coked the intake heat crossover, stuff like that). I can't remember if it had 255k or 275k on it when I sold it. Midstream I hit a deer with it but all it did was break the grille. It was just a good car.
Rich H.
Esse Quam Videri
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Re: F M J Body Cars . . .
[Re: ZIPPY]
#3049493
06/10/22 07:50 PM
06/10/22 07:50 PM
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Joined: Jan 2003
Posts: 10,949 Freeport IL USA
poorboy
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,949
Freeport IL USA
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I had a '76 Aspen that been overheated badly and the original 318 was junk/barely ran. I swapped a '68 318 in. (engine came from a free '68 Satellite). It was metallic black 2 door. I worked really hard on it, but in the end I just didn't like driving the car very much. Looking back, it seems like the suspension felt driving a bowl of oatmeal, or maybe the chassis was super flexible, or something like that. I drove it for about two weeks and put it up for sale. If I did one again it would have to be built up more, at least a 360 if not a big block, and the mushy suspension would have to go.
I still like the way the Aspen/Volare 2 door looks, and think they look especially great as a street/strip or drag car when all done up. They did a nice job on the styling of those.
Later I got an '83 5th Avenue, it had well over 200,000mi on it but ran halfway decent, and I actually enjoyed driving it for a few years until I started hauling PA for my band and it was too small for that. I did a bunch of maintenence to make sure it wouldn't die (timing chain, de-sludged the lifter valley, de-coked the intake heat crossover, stuff like that). I can't remember if it had 255k or 275k on it when I sold it. Midstream I hit a deer with it but all it did was break the grille. It was just a good car. Solid blocks of aluminum in place of the 4 K member rubber bushings helped the handling a lot. So did reinforcing the upper control arm plate. Chrysler bolted a plate to the K member, curved it up over the frame rail, then connected the upper control are to it without any support. I ran a few of them in the hobby stock class at our local dirt track. The failure point on the cars I ran at the dirt track was the front frame rails at the trans crossmember, if the original floors were rusted, that was the weakest point in the car and would twist, and at some point would pull apart.
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Re: F M J Body Cars . . .
[Re: 440newport]
#3049505
06/10/22 08:18 PM
06/10/22 08:18 PM
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Joined: Jan 2003
Posts: 10,684 S.E.Ohio
Magnumguy
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,684
S.E.Ohio
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I ran it with an a 727 for years but finally got the 4 speed installed in 2017 or so.
What trans did you use?
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Re: F M J Body Cars . . .
[Re: Magnumguy]
#3049516
06/10/22 08:50 PM
06/10/22 08:50 PM
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Joined: May 2019
Posts: 6,584 nowhere
Sniper
master
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master
Joined: May 2019
Posts: 6,584
nowhere
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I put an A body A833 in my 87 Diplomat. Used the pedal assembly and tunnel out of an F body. Other than the firewall no longer having the hole for the clutch linkage already stamped out it pretty much bolted in. I used the donor F body to make a template to locate that hole. Kept the original driveshaft. Forget if I had to swap out the yoke though.
The FMJ bodies went thru some revisions over the years. Back when I was fooling with my 87 the yards were loaded with M bodies, the later stuff was a sight better than the early stuff so, by the time my 87 rolled out it had all the updates. I did add a bunch of cop spec goodies my civilian M body didn't come with. Added coolers, thicker sway bars and rear springs. Throttle knob, put in a AM/FM/CD player out of a Neon, Got the dual speaker dash top out of a 5th Ave. Put in the late B body 11.75 discs adn added the cop 8 1/4 rear axle with the cop 11" drums and a 2.94SG.
Put in a mild 360, 4bbl 340 cam, MP ignition.
Probably did other stuff, but I forget anymore, it's been close to 20 years since I sold it.
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Re: F M J Body Cars . . .
[Re: J_BODY]
#3050144
06/13/22 09:39 AM
06/13/22 09:39 AM
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Joined: Jan 2003
Posts: 10,118 MN
JERICOGTX
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,118
MN
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It’s final motivation: very low buck 498. Over is years it was 318, mild 340, 340+6 (fit under the hood trimming one brace), 340+4 NOS, 340/4 with LOTS of NOS , then finally the RB tractor motor with Stage VI heads. Had it for 27 years. Believe it’s sitting in a shop in SoDak now unless it’s been relegated to a tree belt by now. Last I heard from the owner, the tractor engine was being freshened up. He wasn't in too big of a hurry, as he has plenty of actual tractors to work on first.
69 GTX
68 Road Runner
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Re: F M J Body Cars . . .
[Re: poorboy]
#3050151
06/13/22 09:58 AM
06/13/22 09:58 AM
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Joined: Jan 2003
Posts: 18,048 S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 18,048
S.E. Michigan
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I had a '76 Aspen that been overheated badly and the original 318 was junk/barely ran. I swapped a '68 318 in. (engine came from a free '68 Satellite). It was metallic black 2 door. I worked really hard on it, but in the end I just didn't like driving the car very much. Looking back, it seems like the suspension felt driving a bowl of oatmeal, or maybe the chassis was super flexible, or something like that. I drove it for about two weeks and put it up for sale. If I did one again it would have to be built up more, at least a 360 if not a big block, and the mushy suspension would have to go.
I still like the way the Aspen/Volare 2 door looks, and think they look especially great as a street/strip or drag car when all done up. They did a nice job on the styling of those.
Later I got an '83 5th Avenue, it had well over 200,000mi on it but ran halfway decent, and I actually enjoyed driving it for a few years until I started hauling PA for my band and it was too small for that. I did a bunch of maintenence to make sure it wouldn't die (timing chain, de-sludged the lifter valley, de-coked the intake heat crossover, stuff like that). I can't remember if it had 255k or 275k on it when I sold it. Midstream I hit a deer with it but all it did was break the grille. It was just a good car. Solid blocks of aluminum in place of the 4 K member rubber bushings helped the handling a lot. So did reinforcing the upper control arm plate. Chrysler bolted a plate to the K member, curved it up over the frame rail, then connected the upper control are to it without any support. I ran a few of them in the hobby stock class at our local dirt track. The failure point on the cars I ran at the dirt track was the front frame rails at the trans crossmember, if the original floors were rusted, that was the weakest point in the car and would twist, and at some point would pull apart. Thanks, that is interesting. The one I had was super clean, zero rust anywhere but had been repainted. I was thinking they must have made some changes and refinements in the transverse torsion bar/iso clamp chassis, because my M body felt really different, and drove so much better than the F body though the two were very similar underneath. Never bothered to look into it much as the '68 to '70 B body addiction had already set in by that point.
Rich H.
Esse Quam Videri
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Re: F M J Body Cars . . .
[Re: ZIPPY]
#3050290
06/13/22 06:14 PM
06/13/22 06:14 PM
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Joined: Dec 2015
Posts: 675 MI
MI Mopar Works
mopar
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mopar
Joined: Dec 2015
Posts: 675
MI
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I have been a j body freak since I was a kid. Still have my 80 Mirada thats been in our family since 1993. Also have a 82 Cordoba LS that Im cloning into our family car from 30 yeas ago and a neat 82 Mirada CMX I recently acquired. These are great cars for the money still and accept all the same stuff the more popular earlier mopars do.
Last edited by MI Mopar Works; 06/13/22 06:15 PM.
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Re: F M J Body Cars . . .
[Re: poorboy]
#3050439
06/14/22 10:04 AM
06/14/22 10:04 AM
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Joined: Jan 2003
Posts: 18,048 S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 18,048
S.E. Michigan
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The M bodies came along about 4 years after the first F body showed up. Chrysler had more money, and 4 years to correct a few issues. Harder rubber mounts, thicker upper control arm brackets with some support, and bigger sway bars. Even the later F bodies and the J bodies in between the early F & the M were better handling cars then the early F bodies were. Glad you know what I am talking about I always thought "They definitely did something, and Whatever they did, it worked" and never went past that point. Cool to hear about some of the changes they made.
Rich H.
Esse Quam Videri
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Re: F M J Body Cars . . .
[Re: poorboy]
#3050440
06/14/22 10:08 AM
06/14/22 10:08 AM
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Joined: Jan 2011
Posts: 16,166 Central Florida
larrymopar360
Stud Muffin
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Stud Muffin
Joined: Jan 2011
Posts: 16,166
Central Florida
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The M bodies came along about 4 years after the first F body showed up. Chrysler had more money, and 4 years to correct a few issues. Harder rubber mounts, thicker upper control arm brackets with some support, and bigger sway bars. Even the later F bodies and the J bodies in between the early F & the M were better handling cars then the early F bodies were. And you're so right about installing the aluminum k frame isolators!
Facts are stubborn things.
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Re: F M J Body Cars . . .
[Re: larrymopar360]
#3050575
06/14/22 06:34 PM
06/14/22 06:34 PM
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Joined: Jan 2003
Posts: 10,949 Freeport IL USA
poorboy
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,949
Freeport IL USA
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And you're so right about installing the aluminum k frame isolators! [/quote] I ran 4 or 5 of these F,M & J things at our local dirt track in the hobby class. That first one, an F body Road Runner was a learning experience, for sure. It followed a 73 Duster, so the difference was dramatic.
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