a too big carb can get you to get gas in the oil, if its not all used....750 is border line imo...I have a 650 Holley on my 400....runs great.... I had a 650 Holley on a 302 once...wore out the engine based on my comment abv..switched to a smaller carb. got more power , and gas consumption went from 15 mpg to 19 mpg...and was faster. bigger isnt always better.
