that was built here in Houston at Horsepower Engineering. 434 cubic inch s troker with a decent sized hydraulic cam in it. Not sure if Chuck wants th e specs out or not. Has ported and polished ls6 heads on it and a fast 90 /90 combo. Car is undergoing more changes right now for more power and be tter times at the track. check out www.horsepowerengineering.com for mo re info on John Landers z06 (U LUZ) by the way, that dyno was at G-forc e in Friendswood, tx. the car makes 565 rwhp on pump gas