Picked up my rebuild block last week and am now trying to make up my mind on which head gasket to go with. Although I don't plan on beating this motor into the ground or set any records...I tried to build it as bulletproof as possible so that I can occasionally turn up the boost and have fun without too much fear. My best E/T prior to this rebuild was 11.96 @113 with a PT52 at only 18psi boost. This block has Wiseco forged pistons (stock bore), stock polished crank, stock rods, ported/polished stock heads with bigger valves, RJC girdle, Comp Cams billet roller cam conversion, roller timing set, Harland Sharpe 1.65 roller rockers, and the whole package is bluprinted/balanced. My plan was to use the RJC head gasket kit but after talking with another Buick guy he suggested I use Cometics. Could anyone give me some serious pros/cons to either that might help sway me? I've been offered the RJC kit for $120 to my door which is very tempting.