guys, the 346 ls1 puts down 295-305whp, the rating is under rated due to the vette. with some exhaust/cam/traction and the pulleys. he could have no problem taking a stock cobra.
for those who don't believe me, i've seen many ls1's toy with cobra's. my brothers ws6 with full exhaust and little bolt ons ran a 13.2 on 7 cylinders and a toasted clutch.
2012 Toyota Camry SE
2012 Chevy Cruze LT/RS
2006 Ford Escape XLE V6
1991 Ford Mustang LX/5.0