my car is at that pont when age has the better of it and the compression starts to drop. would it be worth it to rebuild the origional heads by resurfacing and porting them? i have FIT 1.97:1 rockers so i didnt know by resurfacing it would cause to much valve lift and hit the cylinder heads.
I live in Brisbane so im after a decient company. any ideas?

Big EV

Car specs

VTII commodore V6
pacemaker headers with high flow cats
FIT 1.97:1 rockers
Bigger bore throttle body and MAF sensor