Whats the difference between the two motors
In 94 the b-body got the vented opti so it got the vented timing cover, and the b-body got 2 knock sensors, the balancer hub is a different length.
There is only one block casting, the rotating assembly is the same for the same year.
Let us know exactly what year engine you find and if it is for your 94 and we can give a detailed account, there are things that changed a little by YEAR more than model car.
1) Use the '95 Bbody bottom end, swap the timing set from the '94 Fbody or install a new timing set for a '94 Fbody, use the '94 Fbody timing cover, use the '94 Fbody crank hub, install a plug to replace the knock sensor on the '95 Bbody block.
2) Use the '95 Bbody bottom end, use the opti from the '95 impala, use the opti wire harness from the '95 impala, swap the '94 Fboby crank hub onto the '95 Bbody bottom end.
The 94 f-body unvented opti setup sucks, at this point it would be silly to reuse it. Just use the timing cover and all from the b-body, all you will have to swap will be the damper hub and accessories.
I mention accessories because I ended up helping someone who blewup a b-body motor anf got an f-body one to replace it and got rid of the b-body stuff before installing the motor and ended up using the f-body setup and it was a royal PITA with the wrong setup in the car.







