Re: High compression head choice.
The two quickest and easiest ways to more power in a Model A are compression and a bigger carb. Compression won't hurt the babbitt as long as you don't let it detonate, so less advance will be needed. When I bought my tudor years ago, I ran it on a F.A.S.T. hill climb in Auburn, CA. A few months later I had changed to a 6:1 Winfield head, it picked up a full second on that same course. On that same day I changed to a Stromberg 81 and picked up nearly another full second! Later I switched to a 97 carb and picked up about 3/10 of a second. That's on a 1/10 mile course of about 6% grade.
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