I like pizza

I think your motor blew because of all the cats you were hiding in the engine. they caused the head to warp because of the high cat compression, and they were playing with the spark plugs because they thought they were mice or fireflys.

thats my honest opinion.

nigel

88crxSi

maybe the zex cam has too much lift and introduced the valve to the piston?

OnYx

you used stock pistons i assume?