Yes the aluminum will be fine with todays fuels. Even works Good with E-85 fuel in them. Me and a bunch of friends run them and never any issues with the tanks. We run 93 octane now, ran airplane fuel prior to that. My other car ran 110 race gas then E-85 and no Problems.
We street drive the blue RR a lot on 93.
When I do my 36 Ply coupe I will have an aluminum tank in it.
David