bjuice

Al what kind of 4150 you have..off the shelf Holley or aftermarket carb..

reason i ask..is that my wife had an off the shelf 4151 750 double pump..i sent it off to Blakes carbs..to be worked and they milled the horn down and did soem trick stuff to the metering blocks etc... and the car picked up 2 tenths.....very,very,Mild 406ci

if its a stock type carb and you can spare a few spare bucks over the next few months..it would be money well spent to send her off to a good aftermarket carb company for some magic work to be done her..

Brian