I could use some vacuum advance tuning help, I'll start with the back round.

It's a 427TD, new plugs, wires, edelbrock AVS2 650, ss headers, full 2-1/2" dual exhaust with an H-pipe going all the way back, HEI, motor was pulled and completely gone through by me. I'm in the process of making it usable. Not completely restoring because it's in good usable shape, a lot better than most I've seen.

Last year after taking it for a ride and pulling back into my driveway it went up in flames. The fire cooked all rubber/plastic/wiring from the valve covers up. I've replaced just about all the wiring (70% done waiting on back order). It starts/runs/drives/stops and is street able.

When it comes to the tuning I've read to set it at 8 degrees which it is, mechanical advance comes in early with the lightest springs. My vacuum advance is hooked up but not currently doing anything. I need to adjust it and am not sure what how far it should be adjusted to. I never messed with my original HEI distributor advance, wherever it was it was great. Without the vacuum advance she's not near as happy as she was with it. I can't seem to find a number on the internet (not a rough one either) specific to my 427td. Anyone know what it should be at? Even a rough number to get me started or a total timing number.

Thanks for reading my long winded post.

Last edited by Pvmt-Pndr; 06/15/2021 9:58 AM.