Hoosier A7 tire size on flared car Options

[PlaysWithCars]

I've been running 225/45R15 on 7" and 8" wheels and they worked fine. But now that I need new tires I'm going to 8s all the way around and debating about stepping up to 245/40R15. Anyone have experience with 245 on 8" wheel? It's within spec from Hoosier for that tire and through email correspondence with Hoosier they said it would work fine. I also asked them about building heat in the tire since I struggle with that on the 225s already. They said that yeah I would build less heat but the cooler 245s would generate more grip than slightly warmer 225s.

[Charles Freeborn]

7's are what I've got, and yes, 8's would draw too much attention in small bore vintage classes. Even the 7's are frowned upon. The Toyo RR's I have on those wheels seem to fit well and are fine for my purposes.
I've got a set of 6 / 7 Fuchs that have the additional inch inboard. I had a pair widened to the inside so I don't have to flare the rear fenders on my '74 911.
I also have stock 6 x 15 Fuchs that I can run if the scruiteneers really get fussy.
I've done some AX and it was fun, but bang for the buck there's more seat time at a DE. Plus the 911 is better suited for running flat out on a road course IMO.
Haven't tried the 914 at AX. That could be fun, but it's a bit of a process to get it warmed and ready (multiple coolers, lines, etc) so going through all of that for a 30 second run doesn't make a lot of sense to me.