in the next month or two i am going to cure my coolant seeping gasket and while i am at it get the head o-ringed, i have studs on the way and will probably do a ats exhaust manifold too while it's handy as mine looks like it's shrunk a 1/4-1/2", whats a good price for o-ringing? piers website lists $300 i guess that doesn't include shipping