Pont 350 in 87 Caprice

[longnlow66]

I am about to start on this project and wanted to see if anyone had some advice. I want to replace the 305/700r4 in this car with a pontiac 350 and a 350 turbo trans I have laying around. My biggest concern is with the motor mounts. The motor I have is a 75 Firebird 350. I was hoping that the frame mounts were the same for the 305 and 301 powered b-bodys, but this doesn't seem to be the case. Should I get frame mounts for a 301 powered b-body and use those? And are there multiple mounting holes in the frame like the G-bodies? The transmission crossmember is also another area that I will need to look at. I hope the 700r4 to 350TH swap is an easy one. My goal is to start tearing the car apart next week so I thought I would post here. I am just looking to build a cheap beater with parts that I have. Here are the parts I have to throw at it. Thank you in advance

1975 350
1967 326 heads
Comp 270 single pattern cam
performer intake
HEI
600 CFM Carter carb
350 TH
3.08 posi rearend

[mike nixon]

That's a bolt in.

The frame from the Caprice you have is the same as a 77 Catalina / Bonneville. The 400 engine was an option in 77. Short of changing wiring for the Pontiac from the Chevy configuration and the A/C brackets it's a simple swap. You may have to move the crossmember forward for the TH350 and a find a longer d/shaft. If that's the case I'd look into an adapter plate to use the 700r4 if it works well.

Mike

[gto1967]

That's a bolt in.

The frame from the Caprice you have is the same as a 77 Catalina / Bonneville. The 400 engine was an option in 77. Short of changing wiring for the Pontiac from the Chevy configuration and the A/C brackets it's a simple swap. You may have to move the crossmember forward for the TH350 and a find a longer d/shaft. If that's the case I'd look into an adapter plate to use the 700r4 if it works well.

Mike
Mike is right. Did this swap into a 79 Caprice and used motor/engine frame mounts from 77 Bonnie 400.

[longnlow66]

Thank you for the help.

[6x400gmc]

That's a bolt in.

The frame from the Caprice you have is the same as a 77 Catalina / Bonneville. The 400 engine was an option in 77. Short of changing wiring for the Pontiac from the Chevy configuration and the A/C brackets it's a simple swap. You may have to move the crossmember forward for the TH350 and a find a longer d/shaft. If that's the case I'd look into an adapter plate to use the 700r4 if it works well.

Mike


The TCI adapter plate is awesome. I used one on my 82 GMC when I bolted the Poncho 400 up to that chevy Turbo 350. They're cheap from summit, and beats having to hunt down a driveshaft.

Britt