[Dennis Kelley]

You can run a jet spilt of up to 10. BG carb came delivered with an an 8 step from primary to secondary. 650 dp bg comes with 70 primary and 78 secondary. BG said not to go more that 10 jet sizes different from primary to secondary. I run 72 primary and 81 secondary with no problems. I think that the 750 comes with 72 primary and 80 secondary. Put more jet in it on the secondary side. Just don't go over the 10 jet split from primary to secondary. Take it to a dyno with a wide band or do what the other have suggested and see where it is at WOT and jet accordingly.

I think the 6 jet split is for Holley carbs. My air fuel runs very good with this jet split. Just my opinion

Good luck

later dennis