I've got an edlebock intake, holley 650 4 bar. settin' on top of stock 350/350 auto., changed distr. to a vacuum advanced and i can't seem to get the timing straight. I can get her to idle pretty good but it doesn't pick up when i stomp it. It studders bad and backfires in carb when stomped doin' 60. Can someone please walk me through startin' w/ initial timing and finishing w/ vacuum so I can double check myself? I'm about to pull my hair out. Thanks to all.