If you had to make a choice what fuel would you run on a boost application 540 procharger with 5 to 7 lb of boost. 91 octane no ethanol or 93 with ethanol.

as much as i hate ethanol i hate detonation worse,i would use the 93.

Do they not offer 93 without Ethanol where you live?

no they sure dont

Surprisingly I have never had an ethanol related problem yet. Have a few hot rods not driven often and of course the boat. Try to at least start up fairly often and always run stabil thru everything before winter storage so it enters carbs ect...I run the tanks down to about 1/4 before winter... Been running 93 w/ 10%ethanol (Our only choice in 93. Try to avoid 91)

Only reason I asked was there a few stations in LA that have 93 Ethanol free. I'm sure there is a link on this site somewhere but here it is just in case

http://pure-gas.org/

I think i would run non ethanol and use octane booster or 5 gallons or so of race fuel,. I despize ethanol fuel.
Ior i would put a exhaust temp sensor in my manifolds.

inner cooler? Steel heads?

inner cooler aluminum heads

Nice set-up, 93 would be my pick too. Whats your CR? Does it have a big cam? Or average hydraulic?