Originally Posted by ben hampton
are newer engine blocks better to build . i have a 86 350 if im going to put money in it should i go for another year block. im building a demo derby car engine so it will take a beating. i herd if i use the right heads i could use any block
There are a lot of tricks that go into a derby engine, suffice to say HP is not
a priority. Longevity is, though. It needs to be built looser than normal so when (not if) it overheats it won't seize immediately. If I was doing a derby I'd look for a 267 SBC. Maybe a 305. Google ice cube motors. And demo derby racing, etc.