Race fuel has lead in it which allot of people need for older heads with cast iron seats, you can bump your timing up alittle more and that will give you a few more ponies.
I mixed 110 sunoco 50/50 with premuim unleaded for years and never had any problems in a 12.5 to 1 compression sbc.
I don't think you really see any power gains on a lower compression motor like yours but if your running older cast iron seat heads it would'nt be a bad idea to give it gallon or 2 of race fuel every once in awhile just for the benifits of the lead, plus the exhaust smells kick azz.
><Cp