Best gas for our Mopars

I purchased a 1968 Hemi Roadrunner, new. It REQUIRED Sunoco 260 102 octane gas. It would knock on 98 octane. lol
Not to mention that it got about 9 mpg's. lol

My 72 Swinger runs are 87 octane quite well. 318/904 It's got an old (NOS) Edlebrock 318 Streetmaster intake, with a rebuilt 625cfm AFB ( found both at the Turkey Run a couple of years ago), with a 904 and a 340 kick down linkage. Cam is a little better than stock, too. No. it's not a race car by any stretch of the imagination. It's a cruiser, and it'll pull about 17mpg's