After much conferring and testing I found my 750 Edelbrock from Jegs was junk. Only 8" vacuum,no vacuum leaks and air/fuel mixture screws did nothing to alter the idle I called the. I no longer had my receipt and they were nice enough to look it up and email me a copy. The warranty ran out 2 weeks before I called but they are honoring it,which is a bit of a pleasant surprise. I also heard from a shop owner who runs mud drag trucks the edelbrocks for the want of a better word are junk. I'll find out soon enough. Anyone else had a problem similar to this?
George