I have never had any problems with Cometic Gaskets sealing even with a standard finish on the block and heads. On my TT Engine I copper coated them and they never leaked a drop on the dyno. I used ARP Studs with lube and torqued the heads to 105lbs FWIW.
http://4secondsflat.com/Cometic-MLS_Gaskets.html
has a good price on the gaskets. You can get any bore size and thickness you need.
