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thanks Hib, The wandering idle was caused by the wrong vac advance can. The car was not making enough vacuum at idle to pull the advance all the way in, so the timing would advance and retard pretty much on its own. So not numbers matching - got it, I've come to realize numbers matching...

Thanks Hib, thanks for the advice, I will try that. I am under the understanding ported vacuum was a response to the emissions era as automakers, GM in particular, used ported vacuum to control the amount of unburned hydrocarbons leaving the engine (using the Air Injection Reactor system)...

Correction Folks - where I said 3500 rpm, I meant 3000 rpm, referring to where my mechanical advance is all in. CN

Need some help - been lurking for a long time – time to post. I bought a '64 corvette a year ago. I Love Vettes - My dad had a '63 coupe in the early ‘70s (Powerglide 300 hp car) and a ’74 coupe (L-82, auto) while I was in high school (I’m 35). I was looking for a clean early ‘70s car...

Update So I took a chance and bought a Pertronix Ignitor III and Flame Thrower coil, set the rev limiter at 6000 and put it all in. Pulls smoothly right up to the limiter, no issues. What a great car. Thanks everyone again for the help.

Great gouge Thanks all for the help. Very informative. I will keep you all posted on the progress I make. Chris

Just bought a 64 with the 365 hp engine. Runs strong up to about 4700 rpm, then goes soft, coughs a bit and just runs out of steam. It won't rev any higher than that. Once ( only once) it dieseled after I shut it down. I'm thinking that's an ignition issue, maybe replacing the coil with a...