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6cyl to 8cyl
#542351
12/01/09 09:28 PM
12/01/09 09:28 PM
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Joined: Jun 2009
Posts: 114
Mashpee,MA
mopar360
OP
Can't start my lawn mower
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OP
Can't start my lawn mower
Joined: Jun 2009
Posts: 114
Mashpee,MA
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As some of you know i am a young kid looking for his first car (a mopar of course). I was wondering, if i bought a car with a 6cyl motor what would it take to be able to drop a 8cyl motor, 350-440? Thanks Ethan 
All throttle...No bottle!
1979 Chrysler 300 (360)
1984 Chrysler 5th Avenue (318)
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Re: 6cyl to 8cyl
[Re: mopar360]
#542352
12/01/09 09:40 PM
12/01/09 09:40 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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couple ways to do it from /6 to v-8 change the K-frame out to a v-8 one use the conversion mounts and if its old enuff /6 you can use a truck engine mount on the pass side and a stock v-8 bracket on the driver side when swaping from /6 to sb using the square bisket rubber mounts (old hot rod trick) a 350 is gonna need a torch and welder as it would be a chebby engine  a 383 would be the same set up as a 440 though,k-frame or conversion mounts the tranny will bolt up in the stock location and use the tranny mount for that yr and style xmember if going BB in an A-body the exhast is the biggest problem and a 383 B engine is a little better fit as the 440 is wider at the valve coves and mucho tight on clearance good luck 
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Re: 6cyl to 8cyl
[Re: mopar360]
#542356
12/01/09 10:46 PM
12/01/09 10:46 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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You'd be time and monies ahead to get a v-8 car in the first place. That way you don't have to piece together things like a K-frame, motor mounts, wiring etc.
The v-8 cars usually have slighty thicker torsion bars, more leaves in the leaf springs, bigger brakes (often disc in the front) too.
Trust me, I took a /6 3 on the tree car and made it into a 440 BB with 727 auto!
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Re: 6cyl to 8cyl
[Re: mopar360]
#542357
12/02/09 08:56 AM
12/02/09 08:56 AM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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you only use the one truck bracket cause of the spacing on the k-frame and its not in the same spot as a v-8 the driver side would be the bracket they used on a v-8 k-frame before the spool types it will use the same rubber bisket mount as the truck and early v-8s driver side is close to block and pass side is got a good size gap the truck mount takes up the space bolts right in wont work if its a spool type /6 though 
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Re: 6cyl to 8cyl
[Re: scratchnfotraction]
#542359
12/02/09 11:43 AM
12/02/09 11:43 AM
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Joined: Jan 2003
Posts: 2,111
Bowie, MD
Reggie
top fuel
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top fuel
Joined: Jan 2003
Posts: 2,111
Bowie, MD
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Quote:
you only use the one truck bracket cause of the spacing on the k-frame and its not in the same spot as a v-8
the driver side would be the bracket they used on a v-8 k-frame before the spool types
it will use the same rubber bisket mount as the truck and early v-8s
driver side is close to block and pass side is got a good size gap the truck mount takes up the space
bolts right in
wont work if its a spool type /6 though
What scratchn said. On trucks and vans, the bean counters figured out how to use the same frame for /6s and V8s. The frame was set up for /6s on the passenger side and they used a conversion type mount for V8s. Attached is a pic posted by a member here showing a V8 truck mount adapted to a /6 car.
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Re: 6cyl to 8cyl
[Re: Reggie]
#542360
12/02/09 01:15 PM
12/02/09 01:15 PM
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Joined: Sep 2007
Posts: 5,037
hi
sharpie
Moparts Linguist
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Moparts Linguist
Joined: Sep 2007
Posts: 5,037
hi
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Re: 6cyl to 8cyl
[Re: sharpie]
#542361
12/02/09 06:14 PM
12/02/09 06:14 PM
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Joined: Oct 2007
Posts: 130
Winterville, Ga USA
rogue_leader007
member
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member
Joined: Oct 2007
Posts: 130
Winterville, Ga USA
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If going from a /6 to a v8, wheather it be small or big block, you'll also have to upgrade torsion bars, stronger suspension, and larger breaks. A slant was backed up by a slant only 904, so that'd have to go as well, not to mention the 7 1/4 diff.
From one young gun to another, save yourself the headache and find a factory v8 car. (unless, like me, you live in fricken ocean of slant 6 cars) *wonder's why people in NE GA only bought the leaning tower of power back in the day*
Last edited by rogue_leader007; 12/02/09 06:15 PM.
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Re: 6cyl to 8cyl
[Re: rogue_leader007]
#542364
12/02/09 06:26 PM
12/02/09 06:26 PM
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Joined: Mar 2005
Posts: 3,445
N.Wilkesboro,NC
DusterKrazy
master
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master
Joined: Mar 2005
Posts: 3,445
N.Wilkesboro,NC
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Quote:
If going from a /6 to a v8, wheather it be small or big block, you'll also have to upgrade torsion bars, stronger suspension, and larger breaks. A slant was backed up by a slant only 904, so that'd have to go as well, not to mention the 7 1/4 diff.
From one young gun to another, save yourself the headache and find a factory v8 car. (unless, like me, you live in fricken ocean of slant 6 cars) *wonder's why people in NE GA only bought the leaning tower of power back in the day*
I agree on this. But I will say that the torsion bars dont HAVE to be upgraded unless you just want to. Yes larger t-bars will make it handle better, however lots of drag racers use the /6 t-bars for quicker weight transfer. Do yourself a favor and spend the $$ on some GOOD brakes.
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Re: 6cyl to 8cyl
[Re: DusterKrazy]
#542365
12/02/09 08:30 PM
12/02/09 08:30 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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what DusterKrazy said I ran the 68 dart with /6 t -bars with a SB got good lift and traction got to watch decel though,it falls just as fast and faster if on the binders x2 if its a BB just another old hot rod trick  they made a /6 heay duty 727 tranz also,cop cars,taxis... ect. the spider gears are a weak link for the 7 1/4 also..they did have a sg unit for them that tuffed them up some as well,but no match for a 440 most 7 1/4 I blew out ( in my neck of the woods) was from the one wheel peel for 2 blocks at a time  the spiders would seize up on the cross pin and start suregripping till it broke a couple passes later yes,thats a perfect pic of the pass side with truck mount...need a shot of the other side too...thats been a while back for that pic  I will make sure to hit the save button..thanks for reposting it  
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Re: 6cyl to 8cyl
[Re: scratchnfotraction]
#542366
12/02/09 08:46 PM
12/02/09 08:46 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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trucks didnt come with spool mounts,IIRC so thats out for a sb and spool type mounts,gotta chop the /6 spool mount and reweld it in the spool type k-frame for sb v-8 IIRC,you need to cut the pass side and maybe the drive side mount off the k-frame and move it around some for a BB on the bisket type k-frame,may have to add a notch to it also some where on the drive side other mods would be welding it all up on stock welds and adding a skid plate and reinforcements to it while your modding it for mounts, myself,I would just use the conversion mounts or bolt up a BB k-frame
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Re: 6cyl to 8cyl
[Re: DusterKrazy]
#542367
12/02/09 10:02 PM
12/02/09 10:02 PM
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Joined: Dec 2003
Posts: 5,314
Carstairs, Alberta, Canada
dave571
master
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master
Joined: Dec 2003
Posts: 5,314
Carstairs, Alberta, Canada
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Quote:
... I will say that the torsion bars dont HAVE to be upgraded unless you just want to. Yes larger t-bars will make it handle better, however lots of drag racers use the /6 t-bars for quicker weight transfer. .....
Absolutely true.
Generally, slant 6 bars are considered the smallest you can run on the street (actual drag race bars are even smaller)
BUT I will add, If talking A body, depending on the year of A body we are talking about here, they may be the same bar anyway. Later A's(ie 73 76) used the same T bar whether they were slants or v8's. Same brakes too, as long as they were 4.5" bolt pattern cars.
Last edited by dave571; 12/02/09 10:03 PM.
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Re: 6cyl to 8cyl
[Re: dave571]
#542368
12/02/09 10:25 PM
12/02/09 10:25 PM
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Joined: Feb 2008
Posts: 163
Winnipeg, MB
sreinheimer
member
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member
Joined: Feb 2008
Posts: 163
Winnipeg, MB
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I put a 318 into my 67 /6 dart a couple years ago and if you can find a v8 car go for it. It will be cheaper than converting to a v8. All the little things add up. I still had the 7 1/4 diff and surprisingly held up and i ran /6 T-bars and 9 inch manual drums all around. I would not suggest keeping those brakes as it can get very hairy at times.
69 Dodge Charger - first full resto
05 Dodge Magnum R/T
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Re: 6cyl to 8cyl
[Re: hemi-itis]
#542370
12/03/09 06:21 PM
12/03/09 06:21 PM
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Joined: Oct 2007
Posts: 130
Winterville, Ga USA
rogue_leader007
member
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member
Joined: Oct 2007
Posts: 130
Winterville, Ga USA
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Then again, you could always go with the "dare to be different" route that my buddy did with his 64 dart, and see what kind of power you can get out of the ole leaning tower of power. Clifford offers 4bbl intakes and a header for the slant.
A couple of years ago, I saw a slant on ebay that was bored and stroked to 340ci.
But still, you just can't beat that V8 sound and torque......
So, a truck mount on the passenger side, and a normal mount on the driver's? That combo work with /6 to 360 swap as well? Save me some headaches with my 70 dart if it works.
Last edited by rogue_leader007; 12/03/09 06:28 PM.
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