Re: Cometic gaskets on BBC?
I've had good luck with them on my new 496, my builder likes them, so I went with his recommendation. 10.5:1 compression
If you search Team Chevelle you'll see alot of discussion on the recommended RA for proper sealing. From the Cometic site:
"A surface finish of 50 RA (roughness average) or finer, is recommended for a proper gasket seal. Anything rougher may conflict with the gasket design."
67 new build alum. 406 | 69 RS/SS 496 631 HP / 618 TQ | 73 Z28 Survivor 36k miles | 89 IROC Z 2500 miles | 02 SS 35th Anniv. LE 645 miles |11 SS Berger 550HP (1 of 25) | 14 ZL1 6M Recaros