OP
Just so you know, this is information only;
I have run an alloy headed 367 at 195psi , on 87E10, with no detonation at full Power-Timing at 3400.
I am at 3650 pounds/me in it, and 900 ft elevation.
I run a two-stage curve using 318 springs, and
My timings are;
Idle at 12/14, climbing to
28* @2800, then to
34*@3400.
My VA has been modified to 22 Degrees and I bring it in as fast it will come.
Cruise timing at 2800 can be 50* minimum
At Part throttle,
I can add any portion of those 22 VA degrees to whatever is coming out of the distributor which also means, I can subtract any portion of those 22 degrees, if my engine ever detonated which, since 1999, it never has.
Oh and BTW
at just 10% ethanol, my fuel system has no problems. The pump is circa year 2000, the 750DP carb is circa 1970. My engine has over 100,000 miles on it since 1999.
Somebody said to do a compression test. My guess is that you will be way under 195psi.