Oh it is the POS 383 engine designs fault--it will just take a bit more time for Nick to arrive at that conclusion. Oh and if youre referring to me as the "resident guru" that said they were all Pieces Of ****--I stand by that statement and emphasize a stock 383/400 is a POS. Next time I'm at the shop I will print out the latest 383 I've dyno'd because I truly don't remember what it made for TQ. All I remember is it was poor and I used my dyno headers with a collector reducer to try and help. J.Rob