650 dp vs 750 dp in a 408

Thanks everyone

Both carbs are holly 4150 DP's only a few years old. i have not touched anything in these carbs, the jets and squirters are the as they are when purchased. i have not run at the track, there is no track anywhere near me anyways.

Just looking to see if anyone has run into this before and if they knew what in the heck was up.

I am not even sure why I thought of doing this in the first place.


The 750 is most likely pig rich. Some proper tuning and the 750 should run the 650 into the ground.