Looking at rebuilding a (Pontiac) 350 for my bird. The block I have access to (which is free - good price) is from a mid 70s pontiac. I haven't had a chance to take a look at it yet, but I assume that one of the first things I'll want to do is find some decent heads for it. I'm not looking to build an extreme powerhouse here, maybe around the 300hp mark.
Anyhow someone locally has listed the following:
1970 Pontiac Heads - $175 Heads are off of a 350, they have small combustion chambers and would be a good start to a high perf pontiac. Likely need to be rebuilt. Numbers indicate they are from late 1969 and the letter code is YU.