Motor is bored only 10 over,has forged pistons,eagle rotating assy.tunnel ram with 450 Holly's on top,msd,compression comes out at 10.24 heads on it.has a decent cam that was matched up to tunnel ram.motor runs extremely well.rev limiter is set to 6k.i have bumped limiter a couple times but try to stay off it.i don't know what impeller is in it.