a stock 440 is probably a 550cfm engine at best. with that 1411 i'd change the metering rods to 70x47's and call it a day. true cfm on that carb is less than 750 and probably about 700-710.


I've found on these carter/edelbrock carbs that the timed port for the vacuum advance will actually pull a little more vacuum than the manifold port at cruise and this can effect driving if not managed when using a vacuum advance. i'm not advocating or even going to to get into the manifold vs timed ports for vacuum advance; either will work. I've also noticed that these 600 and 750 edelbrocks want a lot of jet area vs their old original counterparts. I have the old performance jetting tips from mopar for the '67 HP440 and they won't work with the 750 edelbrock. I don't think the 800's have this issue. I do believe the real issue with these carbs is not air flow but fuel flow/management. I don't think the edelbrocks are made as good internally as the original carters but they do have a place and i'll continue to use them.