985 RWHP on a stock block, that was with aluminum caps.. Had a problem with the heads starting to lift so I went to a KB block and eliminated my...
Make sure you have plenty of wastegate (twin 60's) and a good boost controller then you should be just fine.
Just a couple small 1/8th holes will be more then good enough, just enough to keep a small amount of flow when the thermostat is shut.
Pop your thermostat housing off.. remove your stat and look straight down. Plug that hole! Tap it to a 3/8 ish hole and put a pipe plug in it....
My intercooler is leaking, so I haven't been running any water through it.. When I get a new one made I will blow on it a bit harder.....
