How about a fuel regulator and pressure gauge? The carter does not like much pressure and should be at like 4.5psi. I'm just throwing ideas out that helped me!
Timing chain first. Get it out of the way and be done with it. If you use the Holley, also be advised that you'll need an air cleaner base with the larger "Holley-size" hole in it. Just the base as the top part works with them all.
The '67 NY 440 had a Holley 4160 on it OEM. Might look up the jetting specs in the '67 FSM and match them to the carb you got as you get it rebuilt. The "bolt pattern" might look like a spreadbore, but the spreadbore is longer than it is wide, for the extra space the secondary throttle bores take up.
Could be valve covers, valley pan, or distributor seal also. Oil is pretty high up on the engine for power steering pump?Almost there! Waiting for a puller for the balancer.
I might take the opportunity to change the seals in the power steering pump, while it is out. I think most of the oil/gunk on the engine comes from there. The battery tray is always full of oil, which I think is thrown from the PS pump
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Could be valve covers, valley pan, or distributor seal also. Oil is pretty high up on the engine for power steering pump?
Should be "a trail" from the source if it's not getting deposited due to it getting slung up there. If it's getting slung up there, it should be other places in direct line with where it's getting slung from, too. Like the inner fender, hood insulator, front sway bar, etc.
Just some thoughts,
Interesting that everything in the referenced RockAuto listing looks to be the same stuff from different sources. Some have the extra bearing and others don't.
In general, the sealing o-rings are more concerned with size than application, as are some of the smaller seals and such. Same for the shaft seal.
Perhaps others might have some more info?
Wow you are getting a lot done! I was never really happy with the carter and the only thing that made the car run good was a holley with annular boosters and I tuned it with a wideband.