Originally Posted by
skeet
i figure around 6800 probably max, i shift at 6700 - 6800
they make different thicknesses just use a 6.0 head gasket!! if ya gonna stay NA shoot for a 11:1 cr, i am fine with it and i drive my truck daily. whatever you do, talk to some cam guru's and have them spect a cam for you. only difference is i am running a lq9 i had my heads milled .015 then used a .040 mill gasket.
DBTBSS is very familiar with these heads as to another member on another site, that i followed when i built my motor, i just did a few things different ;)