[coyled]

Like scottj, run a dry sump or if not at least a 9 quart pan with an accusump. I ran a leak down on my motor 6 months back and it was under 5%, which is still good ring seal. The valve springs are designed to go 500 miles in a row at high rpm. Most of us are on the track for 30 minutes max. I don't think that they heat cycle long enough to ware them out but after lots of street miles, when they go, they may just break before you feel that loss of power at high rpm. If its professionally built, well oiled, and you change valve springs when neccesary, you will have a reliable full boogie street and track rocket. scott