No power to coil & backfiring through carb ??'s

Checked the pos side of the coil, no power and still backfires through carb under heavy acceleration... found a vacuum leak at the carb base, replaced the gasket...

and to eliminate questions I replaced the ignition module (or whatever it is on the fender), replaced the distributer and the coil, new cap, new plugs, and the plug wires only have 200 miles on them... Timing is dead on @ factory recommended 12 deg.

ran a temp power wire to the pos side of the coil (i'll have to find the prob), and it starts, idles fine, and if you slowly take it to 4000 rpm's it runs mint.... BUT, from an idle, if you jump on it hard, it backfires huge through the carb (flames about a foot high)...

temp last nite was about 60 deg,,, any ideas?

I'm gonna call Holley and talk to their tech support, but thought i'd ask here too...

thx in advance..



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84 GT,shorty headers, open dual's, bored .060, 10.5" clutch, T5, 89 heads, edelbrock Performer manifold, matched cam, 600 Holley..