Interesting and informative. Thank you shelbydoug
That's about what I know with the exception that there is no difference in running an aluminum head and an iron head about resistance to detonation.
Detonation is simply caused by squeezing the fuel to a point where it explodes without a spark. That is simply cylinder pressure caused by static compression ratio.
The racers adage about adding 1 compression point with an aluminum head was about equalizing horse power with the iron head.
So far there is no data that agrees with that. In fact most of the data I see on aluminum head engines is that they make more hp AND torque BUT there are so many combinations available you can no longer compare apples to apples.
I still have three gallons of Moroso fuel additive left in the garage. Anyone who wants to try it can trade me something of added value.
I personally don't like handling anything "hydrocarbon". You need "mad scientist" gloves with this stuff so that you don't absorb it through your skin. You do not want to know the long term prognosis for your health with it.
It DOES work and turns your non-leaded into 106 leaded but caution needs to prevail.
Oh...in my experience if you go over about 11.0:1 cr, a Ford starter won't be able to handle a hot engine re-start. I had to go to Tilton type race starters in every case. There is an Accell in my Pantera that you can paint blue to look stock. It works well.
A Tilton in my 68 with the 347. Lots of folks are using them in BB Mustangs as well. Once you see your starter wire and starter relay SMOKING and the engine won't quite turn over, you will get a flash back on this post for sure.
Something to consider also.