[poncho-mike]

Are you talking about drilling a hole in either the block or head to match the hole on the other part? I think I remember hearing that either the block or head had a hole for passing water to the other component, but the hole was blocked on the matching component. I think I read this in an old H-O Specialties book, maybe somewhere else.

Has anybody ever tried this?

Mike

Originally Posted by Formulabruce

LT engines from like 93 to 97 were reverse cooling. Newer ones as well, But. PONTIAC did pump coolant into a pipe in the heads in the middle to late 50's . When they went conventional they never put the big holes in the block that Chevy did to cool their heads.
This is where the "421" mod comes into play with water pressure forcing more EVEN and better head cooling.
Pontiac engines from 60-79 don't run at even head Temps and so doing a FI system isn't really as optimum as it should be. A " bung" in the exhaust does NOT tell the temp story on Pontiac's.
While I love reverse cooling, a method to Even out each combustion chamber heat would really be a huge step.
While it doesn't require software, and its very very cheap, a "421" mod can get things evened up temp wise.
Be cool to find a way to monitor Temps at locations.. ( yeah I have an IR Gun.