I have a friend that plays around with stock bottom end 5.0"s.The one in his daily driver is cast everything bottom end with windsor d 303 heads poted a tad also an f or x cam.This was a carb 650 btw runs with a 5 sp in an 85 stang 8.4's at sunshine with me in the car lossing traction a lil.Btw his car has ponie rims for the turns the thing has a great rpm rang in turns.ps ask goop about him his son has the 88 shrt block 140thou mile motor in his race car without the nos he ran 7.04 i think not to bad out of a stock 302 lemme know if you are intrested about some of his set ups