ok, I took the 750 off and put my old edelbrock 600 on. MAJOR diffrence in throttle responce. I think their might have been a problem with the holley, but anyways thier is no hessitation in park however, going down the road at any RPM under 3,500 when I go wide open it kind of stumbles and the rpm goes down about 500 RPM for about a half of a second then it picks up and starts to scream. My freinds car does the same thing with the same carb also. Iv tryed advancing the timing but it doesnt really make a big diffrence. Do any of you have an idea as to what that could be? I appriciate the help alot.


S19243H..... I would make sure your idle is at ABOUT 800 rpm in park first thing. Second take a vacume guage and hook it up to where ur distributor is getting its vacume. There should be VERY LITTLE to NO vacume at idle, if thier is then its the wrong port on the carb. With my truck it idles about 800RPM and in gear goes to about 600. I have a 2500 stall.