RPM Engines built 406. Vortec heads, roller cam, Edelbrock air-gap intake. Made ~470 on the engine dyno. Showed how tough it is yesterday (you know it ran lean for a pass, and it also overheated for very short amount of time pulling into the pits when the fan belt came off). Checked compression and it’s still mint!
This winter/next spring mods-
Standalone fuel system for nitrous
Zeitronix wideband
Shifter (needs it bad, current stock one feels like a broomstick in molasses)
Fiberglass cowl induction hood (at some point-current hood weighs 300 lbs and the air induction is horrible)