Well Dick I think alot depends on what you want to do with your inline and what year your rod is. For instance I think an early engine would be out of place in a 64 nova, where as an early engine is a much easyer swap in a pre 57 car. If your interested in raceing some classes forbid the newer engines. After making these choices, late model, 300 ford 292 chevy early model, 302 or 270 gmc 261 chevy. Your intrest seems to be the early stuff my first pick would be the jimmys, There is more in a jimmy than a chevy with a lot of work.I don,t know this for a fact but I feel there are more 270's and 302's than 261's. Now lets say we found a good 302. If your are lucky we can get some of our stuff of e bay ( I got a Mcgurk 5 carb intake for $50 and some other stuff cheap ) send the cam to one of the venders for a full race grind. send some of the covers to the platers. Yeah we may have more into it than crate motor but we be COOL. If a little is good more is better and too much is just right