Alaska442

I have a 425 and a 93 chevy 1 ton 4x4. Has anyone done one -I was wondering about engine mounts mostly.
Thanks

joe_padavano

You'll likely be fabricating mounts. Mounts from the squarebody trucks with the Olds diesel likely won't work on the GMT-400 frame.

olds 307 and 403

I had a 94 Z71 which I converted to an Olds 350 You need 403 Trans Am motor mounts.
https://www.firebirdcentral.com/1970...p/enc-2240.htm
You also need a transmission adapter.
https://www.summitracing.com/parts/trd-0061
Larry Lorton's adapter brackets with a 82 to 85 Olds Olds 4.3 V6 diesel water pump. Unfortunately, the water pump is in short supply right now. The 454 TBI will work OK. The factory 454 Qjet to TBI adapter makes mounting the TBI easy. An Olds CCC 307 7 pin module distributor will control timing, same wire colours, except one extra black wire, which is ground.

Alaska442

Thanks , Good Info. my truck has a diesel engine so all that goes away.
I'm wondering the the torque converter with need to be calibrated for a gas engine. I planned on ditching all the diesel stuff and using a low pressure fuel pump and carburetor

olds 307 and 403

Yeah, it will be very low stall, probably 1200 rpm. Even the converter flashed around 1500 in the 4L60E in my 94 Z71. Basically match the converter to the cam in the 425. The Olds makes a better truck engine than a sbc or LS.