Re: Has anyone put a 3.9 v-6 in an a-body?
[Re: syleng1]
#1981253
01/01/16 05:52 PM
01/01/16 05:52 PM
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Joined: Jan 2005
Posts: 12,422 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,422
Kalispell Mt.
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The v6 is going to be harder to drop in than a V8 as you will need to make your own motor mounts and if you want headers you will make them also. I doubt the magnum manifolds will fit an early A body, they barely fit the later A bods.
A 273 is a bolt in, don't make too much power and can easily be swapped for a 318 340 360 or even a 408 later when he is ready to lose the training wheels.
All obstacles aside I would do it if I was planning it to be the permanent engine because I like things different. I would not go through the hastle if the long term plan is something bigger eventually.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Has anyone put a 3.9 v-6 in an a-body?
[Re: syleng1]
#1981331
01/01/16 07:16 PM
01/01/16 07:16 PM
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Joined: Jan 2005
Posts: 12,422 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,422
Kalispell Mt.
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It is a 318 with the two rear cylinders cut out and the motor mount ears cut off.
You can not just hack two tubes off the headers as the exports are out of sequence, there are no headers off the shelf for it, the TBI/Carb manifolds bit and will hit the steering so you are stuck with the rear dump magnum manifolds and even they may not clear the firewall.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Has anyone put a 3.9 v-6 in an a-body?
[Re: syleng1]
#1981389
01/01/16 07:57 PM
01/01/16 07:57 PM
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Joined: Jan 2003
Posts: 1,482 Lake Orion, MI
goldduster318
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,482
Lake Orion, MI
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I'd just slap in a 318 2-barrel, a totally stock one. Honestly, it's probably still going to be slower than my 2012 1.4L, 138hp Cruze. Especially with tall gears. Makes about the same HP as a stock 3.9 Magnum anyway.
'70 Duster 470hp 340/T56 Magnum/8 3/4 3.23 Sure-Grip
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Re: Has anyone put a 3.9 v-6 in an a-body?
[Re: syleng1]
#1981409
01/01/16 08:17 PM
01/01/16 08:17 PM
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Joined: Jan 2003
Posts: 20,201 Park Forest, IL
slantzilla
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 20,201
Park Forest, IL
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I've thought about a swap like this too, just because it is different. Unfortunately, a 63-66 A body engine compartment and trans tunnel suck for roominess. They are really difficult to fit exhaust on any engine besides a Slant. A stock Slant would fit the bill for low power, and is easily hot rodded later.
"Everybody funny, now you funny too."
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Re: Has anyone put a 3.9 v-6 in an a-body?
[Re: syleng1]
#1981420
01/01/16 08:30 PM
01/01/16 08:30 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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If you mount the front of the V6 in the same location as the 273 then the OD trans is shifted about 4" farther forward, putting the fat part of the tailshaft in a "roomier" area, roomier being relative.
You also put the stock V6 rear dump exhaust manifolds pretty close to where a stock V8 exhaust would dump.
You also move the rear sump oil pan forward.
It any of it enough to make it fit? Dunno, haven't found a cheap enough donor yet.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Has anyone put a 3.9 v-6 in an a-body?
[Re: mikemee1331]
#1981735
01/02/16 01:45 AM
01/02/16 01:45 AM
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Joined: Feb 2010
Posts: 18,493 Granite Bay CA
Kern Dog
Striving for excellence
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Striving for excellence
Joined: Feb 2010
Posts: 18,493
Granite Bay CA
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what's wrong with using the slant six? they can be pumped up and still not worry about on coming telephone poles! plentiful and cheap. i know it's not what you asked but i was considering doing this for my son until he rode in a jacked up Jeep! I agree here. I like the idea of alternative swaps but I wonder what sort of extension you'd need for the water pump and fan to reach the radiator! Maybe an electric fan would be better? You'd gain some handling balance in terms of the center of gravity moving slightly rearward. Keep us in the loop here, this could get interesting!
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Re: Has anyone put a 3.9 v-6 in an a-body?
[Re: dogdays]
#1982094
01/02/16 04:25 PM
01/02/16 04:25 PM
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Joined: Feb 2010
Posts: 18,493 Granite Bay CA
Kern Dog
Striving for excellence
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Striving for excellence
Joined: Feb 2010
Posts: 18,493
Granite Bay CA
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I run mine on the same Ethanol blend out here in CA. Mine runs fine. I know that I'm not lucky or special, just that many people claim that CA gas is even worse than what people get in other states. A return system in your fuel line can make up for the fast evaporation rates.
Last edited by Frankenduster; 01/02/16 04:26 PM.
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Re: Has anyone put a 3.9 v-6 in an a-body?
[Re: syleng1]
#1982142
01/02/16 06:01 PM
01/02/16 06:01 PM
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Joined: Jan 2005
Posts: 12,422 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,422
Kalispell Mt.
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Gonna need to fab an oil pan or at least run the steering linkage through the sump, doubt your gonna find a pan to bolt right in as the only one ever made is rear sump.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Has anyone put a 3.9 v-6 in an a-body?
[Re: syleng1]
#1982184
01/02/16 07:01 PM
01/02/16 07:01 PM
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Joined: Jan 2003
Posts: 20,201 Park Forest, IL
slantzilla
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 20,201
Park Forest, IL
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No offense sir, but if you can't get an N/A Slant to run right you'll have a disaster with a turbo/efi V-6.
"Everybody funny, now you funny too."
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Re: Has anyone put a 3.9 v-6 in an a-body?
[Re: syleng1]
#1982780
01/03/16 04:18 PM
01/03/16 04:18 PM
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Joined: Jan 2003
Posts: 3,122 Auburn WA
Dave_J
master
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master
Joined: Jan 2003
Posts: 3,122
Auburn WA
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A bit more exotic swap would to be mating a Mitsubishi 2L turbo to a BUILT Baby 904 from a 78-84 Challenger/Sapporo and with all the computer controls for that Mitz motor you'd have up to 500 + Horse. Very light, small in width and full of power. Set the computer controls down and have 175 to 200 HP and as your driving just tweek the settings and POOF Raging bull in a china shop.
Last edited by Dave_J; 01/03/16 04:20 PM.
Retired, US ARMY 1973-1994 ASE mechanic, Electrical 1994-1997 Retired GTE/VERIZON/FRONTIER 1997-2015
Posting cheap tech help (CRAP) here since Nov 97, 1000's of posts, some may be good.
03 Suzuki Burgman 650(Burger King) Scooter 65 Formula S Cuda 78 Little Red Express Truck 98 Buick Regal (wifes car)
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