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Jack stated this, regarding timing:
(for my '73)
With all the vacuum lines removed from the distributor, rev the engine to achieve maximum centrifigual advance, and the timing should be at about 35 degrees BTDC. He recommended making another mark on the flywheel. I'm suddenly thinking that I know what the 'mark' is on MY flywheel... So, if you are at 6 or 9 or whatever at idle with the vacuum lines disconnected and plugged, you should be able to rev and timing should advance to 30 or 35 or so, I can't see my notes, I think I scribbled them on the MSS exhaust installation instructions.
I think my centrifugual advance was frozen, but a little (well a lot) of WD-40 fixed that. When it was frozen, my timing was pretty darn static. I could rev the engine, and it would stay about the same.
Can you rotate your rotor a little bit? Like I say, I think I fixed mine, but I don't really know, here is why:
I put on my MSS exhaust last night (and this morning, and late last night, like from 8PM -8AM). I removed a MSS header. Looked like it had been on there for a while. I'm pretty sure I ended up having an MSS resonator attached to the rear of my car, and now it's attached to the MSS exhaust. Wow, it really really sounds good, like a racing car, really!
UNFORTUNATELY... I had to DRENCH the studs with WD-40, in fact, two of them came out as studs, they were so seized. I accidentally had left the negative battery terminal hooked up for a little while, sometime during the repair I unhooked it, but when I was done, I had NO STARTER...
I hope it will self-repair, or that a simple removal/disassembly/reassembly/installation will cure it, as I'm guessing these starters aren't easy to come by.
So anyway, my point was going to be that we push-started the car, and it's fine, sounds great, and runs, but I can't start it, and I forgot to check the timing.
FYI, Jim, you DO NOT NEED A HELPER to do the timing. Simply loosen the distributor hold-down bolt enough to move it with a little friction, take your light, and hook it up to cyl #1 or the coil wire (the latter gives you the exact same #1 strobe, but more light...) and shine on... just adjust the distributor a little until you are happy with the light, then tighten it down.
You should be able to reach the throttle linkage under the air cleaner and reve the engine while you strobe the timing mark. Just watch for little backfires out of the carb if you get it wrong and start reving the engine.
FYI, I completely disconnected and plugged the vacuum retard. It's the one that comes out of the thermostat housing, into the 'back' of the vacuum pod. Retard is for emissions only.
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