Hey Rob, don't come on here very often. Have you spoken to Kevo- his old rail was putting out some big power if i remember but was on Pauter heads, I also believe it had a stroker crank in it so may not be of much use if its the stock bottom end route you want to go down.
I think Russ used stock bottom end and heads to about 280-300hp would be interesting to know if going Pauter heads alone could free up some extra hp and allow more boost. In fact no- don't tell me otherwise the car will never be finished