we just got home from silverlake sand dunes, had a blast even though I couldn't do the hill climb or drag racing, I had the domes cut for the 4mill crank and got rid of the stroker plate and now my motor lays down on the top end it was good with the plate in it, the plugs looked lean so I went up in jet size 4 times and it helped but still not good, maybe its time to get it ported for the 4 miil?