dognutz

How much milling can gt40 (not P's)explorer heads take? I would like to get to 9.5:1. I'm wounderingare there issues with milling the headsthat much, will there be issues with pushrod angle/length or intake mating problems? What shouldI request from the machine shop as far as combustion chamber size?I've heard around 60cc.
this will be for my basicallystock 90 notch, until funds improve.
TIA
mods:
gt-40 intake with matching TB
CAI
3.73's
equal length shorts O/R h pipe to flows
1.7 roller rockers
3g altermator
electric fan

imnotmy77stang

just have em knock off around .020 or so, it will bump your ratio up and you wont have gasket problems - though you could take .030 and still prolly be ok

TMC

Unless your going for big compression i wouldn't bother milling them very much as the increase in power from 9.0 -9.5 won't be that much. Additionally, GT-40's don't have extremely thick decks so excessive milling can lead to warping and blown gaskets. .03-.04 should be fine to take off but that's just not much of a power increase anyway so why bother.