Hi I'm new here and to owning a stovebolt engine my 1950 Chevrolet motor was no good when I purchased it I found a add in craigslist for a 235 for sale .the motor rolls over smooth so I removed all the spark plugs and looked inside the holes the cylinder walls look really nice recently cross hatched and the tops of the pistons ate new no carbon .I think I scored a good motor for 350.00 but when I got it home I found that I have a 1958 261 engine block with a 1956 cylinder head from a 235 .I'm kinda confused here because what head gasket do you use are the heads the same .should I look for a 261 head . the guy I baught it from told me he got from a co worker that told him it runs it looks like it will run but will it run properly .