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How much cooler can we expect the engine to run ???

A lot cooler, in fact once properly tuned you will only use your fan on occasion. Getting heat in it is more difficult then cooling, I would suggest a leanout valve and a vac pump to suck out the condensation/alky.



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How much more timing can we give it ??? I've never been past 36 Degrees with a big inch mopar before....

It may not want more then 36. I would start a few * low like 32-33 make some hits and read the strap on the plug and et slip to see where it is happy


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And where roughly do I need to start with jetting an alcohol carb

without knowing who's carb you have that one can not be properly answered. No 2 carbs are built the same. I had a Rupert 1050 on a motor similiar to yours that ran 164 jets. Same motor with APD carb had 192 jets. Best to get a good carb from a reputable builder and use what they say.