So this is what I have. A 66 Chevy C10 with a 283 .030 over, Edelbrock performer intake and 204/214 cam, 416 305 heads, powerglide and 3.73 rear end. My problem is pretty simple. I just can't get a decent idle. Nothing under 1000 rpm and it is darn near impossible to take off without killing it. This is a fresh engine and I haven't tried anything else on it. I don't seem to have a vacuum leak. I used a squirt bottle of water and sprayed around all carb and intake edges that I could reach and couldn't find anything. I've played with the secondary screw, made sure I had the "square" on the primary transition slots and I'm just stumped. Nothing seems to make it better. It is an electric choke and I think that may be causing me some trouble but I have no way of knowing for sure. All adjustments so far have been made with a vacuum gauge and as far as I can tell the timing is right or at least close enough not to matter. I'm about ready to try an Edelbrock 500 or stick that little 2G back on Any ideas?
Is it an early Edelbrock intake? With the spreadbore pattern in the secondaries? Then you likely have a vacuum leak, edelbrock sells a flat plate to seal the spreadbore GM to squarebore holley. The leak is up under the sides of carb and hard to spray into.
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