I have a 1978 Buick Electra 225 with a 403, i have a 430 out of a 1968 Electra 225 with 83000 miles on it. I want to put the 430 in my 78 Electra what kind of problems will I run into???

If I'm not mistaken the 403 is actually an oldsmobile motor that was offered in the car. My first concern would be if the bolt pattern on the transmission, is it a 350 turbo, will accept the older buick engine.

From 1967 forward all Buicks, Pontiacs, and Oldsmobiles used the same (BOP) transmissions. The 403 is an oldsmobile engine. It was used in a lot of Pontiac Trans Ams of the era. It's actually a very large small bloce. Both the TH350 and the TH400 will bolt up, the difference is how much torque they can handle.

I know the trans will bolt up I am worried about the motor mounts and the exhaust

iF YOU DECIDE NOT TO USE THE 430, LET ME KNOW! 727-846-1193 jJason