I have 220 psi per cylinder and that is only 10.750 to 1 compression.
In your intake manifold tap a small hole for a vacume gauge. Under full load "on dyno" it should read almost zero. If it is produceing vacume then your running lean and it needs more fuel.
Do you have a fuel pump on it or is it still gravity feed ?
You are on the verge of race fuel and it wouldn't hurt , don't use A/F gas it has antifreeze in it.
Set your timing on the dyno under full load , go for highest rpm under load. We use a digital timing light with a tach in it.
Email me direct if you have any more questions, i run a dyno service.
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Today's Featured Article - The 8N and the Fox - by Zane Sherman. Dec. 13 1998, Renfroe, Alabama. Last niht I dreamed about the day that I plowed the field of about 10 acres over on what Jimmy and Dandy called the Ledbetter field. I was driving the 1948 8N Ford tractor that Jimmy bought in 48 new This was prebably in about 1951 and maybe even befor the house was built. This would have made me to be about16 years old and I drove the tractor for nothing and would have paid to drive it if I had had any money which I didn't, but neit
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