With good tuning they can make some good power. But mine was an L33 (aluminum block). They can still make good power IMHO, and 150ish pounds lighter is nice too.
This will be my next build. It started out life as a L76. I'm planning to bore it .030 over & destroke it with 4.8 liter crank & rods. Then it will probably get a Holley Hi Ram intake and a decent size turbo. I'll be looking for 9000 rpm.
Roger when where u going to tell the rest of us about this build