Conversion from V-6 to V-8 - Team Camaro Tech
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post #1 of 7 (permalink) Old Mar 22nd, 01, 06:41 PM Thread Starter
Join Date: Mar 2001
Posts: 7

I have a 1985 Camaro with a V-6 (2.8L MPFI), 700 4R transmission and 7.5 rear end(3.42 ratio). How hard is it to convert the V-6 to a V-8?? I have a (factory stock)1971 chevy 400 (2bbl.) sb that I could use. If the conversion is not to pricey. Will the 700 4R adapt to the 400 sb?? Will the rear end need to be upgraded?? Thx in advance Jim

Camaro2Rn Nebraska
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post #2 of 7 (permalink) Old Mar 22nd, 01, 08:07 PM
Tech Team
Join Date: Jan 2001
Location: decatur, il
Posts: 64

i can tell you that i am doing the same swap on my car, i should have it done by now but i broke my leg and had too many bills. so far it has been ok but i will not be doing the actual swaping of the engines. your tranny will not work and you will have to get a new one i know that for sure. as far as rear end goes i will tell you if my falls apart once i get the engine in.
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post #3 of 7 (permalink) Old Mar 29th, 01, 07:45 AM
Join Date: Mar 2001
Location: Frisco City, Alabama
Posts: 12

I am getting ready to do the same swap on my '89 RS. If you guys have any advice on what I need to do, let me know. Thanks.
Mr Bowtie is offline  
post #4 of 7 (permalink) Old Mar 31st, 01, 02:09 PM
Join Date: Mar 2001
Location: MA, USA
Posts: 2

I have an '87 sports coupe with a 2.8 MPFI also. Damn do I want a V-8 in there. Will somebody please answer this man's question, so I can get some info from it. thanx
dkeymont is offline  
post #5 of 7 (permalink) Old Apr 2nd, 01, 04:11 AM
Senior Tech
Join Date: Jul 2000
Location: Stuart, Florida
Posts: 567

I have done two of these swaps and they are not too bad. Its noce, since the cars came V8 from the factory. You NEED the stock camaro oil pan. If you do not use it, you will have a major problem getting a y-pipe to fit. You need to unbolt the stock motor mounts and move them to a different set of holes. It is a pain since the nuts are up inside the crossmember. As for rears, the 7.5 is not as weak as you think. Most people just drive like morons and break things. We have two cars running in the 11's on DOT tires with 7.5's. The gears and posi are aftermarket. My Firebird has around 375 HP and runs a stock 3.73 7.5 rear. I would not want to launch on slicks, but street tires are not a problem.


1992 Firebird 355/Six Speed (Soon to be LT1)
1991 RS 350 / 700-R4
1987 Toyota Pickup 383 / 500 + HP 10.963 @ 119.95 Slicks / 11.997 @ 114.23 Radials
"Speed KILLS, so drive a FORD and live forever!"

Member of the "unwanted" 3rd Gen group.
Mark W. Winning is offline  
post #6 of 7 (permalink) Old Apr 4th, 01, 11:48 AM
Join Date: Oct 2000
Posts: 117

is it a completley stock 400 sb? i put a 400 sb in my camaro and with a nothing but intake 600 holley carb and headers it ran a 15.60 this was with no stall stock turbo 350 and the stock 3.42s i thought it ran prety good but after putting a 490 lift comp cam in it with a 750 carb it knocked off a full second in the quater it was running 14.50 with nothing but cam and the stuff i listed up there so thats pretty good i have alot more stuff on it now put still runs only a 14.30 but were doing some stuff to it right now so hopefully it will get my in the high 13s good luck it should be another mustang eater if u can get every thing right.
camaro79tx is offline  
post #7 of 7 (permalink) Old Apr 5th, 01, 04:34 PM
Join Date: Apr 2001
Location: faribault, MN, USA
Posts: 3

I'm planning to take out my 2.8 MPFI and droping in a 350 TPI, yes I'm going to keep the ECM system (all I hear is "why do you want to keep that damm computer" spoken by people who don't understand the system)
The key to making a successful switch is to research! and plan ahead and don't rush.
Any way I will be making a step by step Web site for doing this conversion.
It maybe awhile before its complete.


I'm not shy, Im Just observing my Prey
birdofprey83 is offline  
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