The stainless rings on the gasket were curved in towards their cylinders. About 3/4 of an inch in the center is gone. The O2 is a wide band from Innovate with a analog gauge. Also my pyro was 950 degrees when it went. I'll check on the gaskets you use for pricing. I'm doing this on a pretty tight budget. Do you have to run o-rings with your gaskets? As far as an et I'm sure it was on a low to mid 11 second pass. It was all ready faster then the cadillac engine that ran 11s. I guess I'd better get some race gas to develop a tune. Even 110 around here is $7.00 per.