Engine/Transmission Swap

Asked by Jun 03, 2013 at 06:48 PM about the 1984 Pontiac Firebird SE

Question type: Car Customization

I have a 1984 Pontiac Firebird S/E with a V6, Rochester 2 barrel Varajet Carb and the
700r4 stock automatic transmission. I was given a 1968 Pontiac 350 engine with a
Rochester 2 barrel Varajet Carb that I plan on rebuilding as it has sat for 7 years.
Can I put the 350 into the 84?  Will I need new motor mounts and a new tranny?  If so,
what tranny would go with it?  Turbo 350?  Turbo 400?

5 Answers

37,375

If you are just rebuilding to stock the 700r4 will be fine and should bolt right up, there is also a kit that costs about $125 to rebuild the transmission, it has a larger servo for the band and a Kevlar band, I think the kit gives the trans a disability rating of 500 hp. Worth looking into, the 700r4 was used on "PRETTY MUCH" all rear wheel drive GM vehicles up to the early 90s. That was capitalized and quoted because it wasn't used in all rwd vehicles just most.

1 people found this helpful.

Can I put a 350 engine in a 1984 Trans Am from a GMC Vandura van

I'm trying to convert my 700r4 to a 350 turbo will I have to buy a new tail shaft and a different cross member or will the stock 84 trans am cross member work?

The Pontiac 350 is NOT a straight swap, The Firebird came with a CHEVY 305 and Chevy transmission. Pontiacs will NOT bolt to these. The exhaust is another issue. It will take some hunting to get the right fit manifolds. B4 that you have a mount issue. No Pontiac mounts exist as no Pontiac motor was ever offered in 3rd gen Firebirds. It CAN be done, but it take a accomplished mech. /builder.

You'll also have problems bolting a 700r4 to a Pontiac block. The transmission only has a Chevy bolt pattern, so you would need an adapter plate.

Your Answer:

Firebird

Looking for a Used Firebird in your area?

CarGurus has 695 nationwide Firebird listings starting at $3,995.

ZIP:

Pontiac Firebird Experts

  • #1
    Samuel Moore
    Reputation
    1,030
  • #2
    dandyoun
    Reputation
    840
  • #3
    Tom Demyan
    Reputation
    820
View All

Related Models For Sale

Used Chevrolet Camaro
260 Great Deals out of 27,404 listings starting at $2,900
Used Chevrolet Corvette
87 Great Deals out of 15,194 listings starting at $4,499
Used Ford Mustang
297 Great Deals out of 40,392 listings starting at $1,312
Used Dodge Challenger
185 Great Deals out of 22,223 listings starting at $7,495
Used Dodge Charger
347 Great Deals out of 29,951 listings starting at $2,000
Used Chevrolet Monte Carlo
4 Great Deals out of 976 listings starting at $1,125
Used Ford F-150
2,398 Great Deals out of 200,117 listings starting at $1,300
Used Chevrolet Impala
527 Great Deals out of 26,257 listings starting at $995
Used Nissan 300ZX
4 Great Deals out of 147 listings starting at $5,500

Used Cars For Sale

2002 Pontiac Firebird For Sale
100 listings starting at $6,877
2001 Pontiac Firebird For Sale
54 listings starting at $4,200
2000 Pontiac Firebird For Sale
49 listings starting at $6,995
1999 Pontiac Firebird For Sale
51 listings starting at $5,500
1998 Pontiac Firebird For Sale
39 listings starting at $7,600

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.