Can the 350 V8 from a 1978 Buick be installed into a Chevy of same vintage?

Or is the bolt pattern on the bell housing of the transmission different? I know this was a problem with GM's prior to 1972 (Pontiac Old's could be inter changed). Not sure how far this continued and/or if Buick ever could change with Chevy?|||2 completely different bell housing patterns ..the BOP pattern ( buick olds pontiac ) has only 2 bolts that line up and the engine mount positions are different that pattern stayed that way until GM went corporate in the late 80's or arly 90's|||i'm not positive,but i know that about that time olds used some chevy engines,so my guess is that they will interchange to prevent an assembly line stoppage due to a strike at one of gm's engine plants.|||The answer is yes it will. Just take the frame mounts with the motor mounts and swap them to the Chevy. The bell housings have different bolt patterns but they make an adapter plate to make it work.|||well some of the buick's had chevy motors and others had buick motors. but some could use either because of a brilliant design to the trans, as we have what is known as the universal transmission. the 78 should have that trans from the factory.|||Yes it will work with slight mods, as you have not stated if the eng is buick, chevy olds or pontiac. But it will fit without nightmarish problems.|||Yup most GM are interchangeable|||You have to identify the engine by division not displacement. Chevy, Olds, Pontiac and Buick all built "350" cubic inch V-8s and there were virtually ZERO interchangeable parts between those engines. Your 78 Buick likely already has a Chevy built 350 installed. Yes, you can bolt a Buick Division 350 engine from a LeSabre or Skylark into a Chevelle, Cutlass or LeMans IF you have everything from the donor car. Even the wire harnesses were different! If you look at the engine cross member of a later model "G" body you will see many sets of extra mounting holes for the mount pads of the different engine packages that GM offered at the time. This is the major reason the GM went to using SBC in everything with a V-8, they are cheap and reliable. PLUS, they did not have to build all the different pieces for every car line! The savings was tremendous for GM! You are correct; Buick, Olds and Pontiac use one bolt pattern and Chevy uses its own unique pattern, another reason to standardize engines. Also the SBC was lighter and much more compact than the others as well, so it fit more easily into the smaller downsized cars that GM was shifting to at that time.