get an after market one just b/c... metal > paper!

the i have forgotten all my head work math so idk about compression! but there is never anything wrong with shaving the head IMO. if nothing else shave and plane it so its so sessi! and i'd recommend doing new head studs/bolts etc etc simply b/c over time they stretch out and no reason in risking such a nice bit of work go get'm laddy!