So you got those #s with cleaned up stock LT1 heads? If so that is impressive. Also, what springs did you use with that cam? I thought you would have problems with those XE-R lobes at thopse high rpms, atleast that is what I heard.

 

Your dyno graph looks almost exactly like mine, except mine peaks lower and is right at ten hp and tq lower. Gotta love those XE cams and the PHAT torque curve.

 

Cleaned up + .... Really like a stage 1.72 port.. heh I used the Combination Motorsports "619" valvesprings.... They're a little crazy. Pretty stiff and handle near .750 lift before coil bind. I'm running a good valvetrain setup. Chromoly pushrods, pro magnum rockers, 7/16 studs and guildeplates, and comp R lifters. I was running stock lifters and an AFR rev kit - and w/ that setup the car wouldn't rev past 6100 rpms. On the street it was more like 5900.