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i have to figure out what "U/C" studs means...


It means "undercut".

FWIW, I tried an OE MLS head gasket set on my first blower engine and it leaked oil because the machine shop did not get a good enough finish on the heads. This leak was evident even before the engine had seen more than 2500 rpms. So, if you're going to use those, you'd better have a machine shop with some very good equipment.

I have found the OE composite head gaskets to be among the best I've ever used.

My present engine has a head shim sealed to the block with spray hylomar, an OE composite gasket, ARP U/C head studs and runs at 6.5psi boost with no issues.

Frank

'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum