Distributor setups for L78 or L72 engines?

[Jeff H]

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I'm not a fan of the GM hei pieces...while they will work, *IMO* they look out of place, and believe it or not a good points system can work just as well. Anyway, when is your total timing in? And what compression & pistons you running?

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Rob, the motor is a bit of a mystery to me since it was built by a previous owner. All I know is it has the 820 oval port heads which probably lower the compression a little, the stock L78 intake, Holley 750(that's been messed with), the GM HEI distributor and headers. As for cam and pistons, I have no idea but will assume they are stock. I don't plan on racing the car and I'm not worried about 100% stock appearance at this point in time. Regarding the vacuum advance, I'm reading around 36 of timing with the vacuum adv disconnected. When I reconnect it the total timing jumps up to around 50 or so. Is that correct? Should the vacuum advance still be adding in at higher revs? I don't get any pinging so it sounds fine.