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The Webers can`t handle the stock fuel pump? Give us a break and tell your expert its done everyday.

About your cam selection, its easy to overcam. Again your engine builder should know better than anyone what cam belongs in there. Its hard to beat the Engle 110 in a daily driver.
In my thing using a similar size engine(t-4 however) I was very happy with the mild WebCam #73. Makes gobs of power down low. Good luck. Bob Ingman

I wouldn't anticipate any problem with a stock pump and no regulator, provided the stroke is normal on the pump (if you shim up the distributor drive pinion for less endplay you may need to shorten the pushrod slightly, or stack extra gaskets under the pump). If it does become a problem, get the "red" Holley regulator.