I'm using Total Seal. Modern style ring pack with thinner top and 2nd rings. They ain't cheap, but will work well for the type motor I'm building. 65 block I got from a member here, .030 over with forged flat tops at zero deck, Bullet hydraulic roller with .447 lift on both sides, 302 heads with 1.88 intake valves and a little pocket porting. Gonna flip a coin on a Weiand 8007 and an Edelbrock D4B. MP ignition, and Dougs D450's. Not too wild of a motor, but enough to make my 65 Barracuda get out of its own way!