[JLMounce]

Originally Posted by ta man

32 degrees total 20 initial. Im surprised by the higher total numbers others have. I thought most were in the 28 to 32 range for these heads?

I'm nearly a mile high. The lack of oxygen requires a couple more degrees of ignition advance. I also run on 91, which is probably more octane than the engine really needs at 10.3:1 compression.

At sea level, I would bet I make peak power with more like 32-33 degrees of total timing.

[gman005]

So i was looking at the cables the positive cable is tiny compared to the ground cable plus I'll change the starter. The battery doesn't look old but it's only a 700 cca.

[sdbob]

I had same problem with my 63,and 421 in late 60s.i go out where guys were street racing stop the car.Short time tried starting it,nope good battery. Cooled off started right up.The starter bushings were egg shaped. Then I learned how to install new bushings. No problems then.

[gman005]

This might be my problem?

[steve25]

That’s a certainty!

[Tom Pugh]

trash that old starter and put a mini-starter in with at least 2 awg cables on both the pos and neg posts. I use 1/0 gauge in mine.

[gman005]

I bought a rebuilt starter and put 2 gauge cables on.

[GOAT8U2]

Wow that's a rough starter, you got your money out of that thing. LOL

14.2 AFR idle here, roughly 22 degrees timing, don't need to get greedy and burn up valves and also we're assuming each cylinder is getting the proper air and fuel which is never the case, rather error slightly rich than lean.