I did'nt think this thread had anything to do with 700+ hp block choices,more like those intermediate choices between what is suitable to use for a stock 250-300 HP build,what is suitable for the intermediate 350-600 HP builds and
NOT those said 650-700 and up HP builds.
You know,to help keep folks that are new to (or unfamiliar with) pontiacs from sticking they're nice new stroker crank bottom ends in a weak "late" block and having it nuke itself even though it's only making 450-500 HP...
If those here cant see the obvious weakness in the design of the #500557 block castings,then I dont know what to say,just give up engine building and leave it to those who know what to look for.
If I had a better selection of the "late" 455 blocks,like those Brian and Dude keep refering to I'd be inclined to shine a magnifying glass on that subject too,but my 455 selection amounts to 2 right now,and one of those is in a car already,and it's an earlier block anyhow,so that would'nt help much with this project.
I just felt this would be a good reference for
STOCK block comparison,a databank one can tap so they can see what the differences are between various castings.
Not another excuse to start a stock block vs. aftermarket block debate...