RCR40 Front Rims in 9" and 275 will fit ?

I'm running on the track Hoosier A7 in 245 on 8"+17" BRM and would like to know if there is a chance to run 9"+17" Rims with 275 ? It looks there is enough room to the inside to go 1" wider

Fran Hall RCR

The BRM rims are not available in 9 in front without custom modification
The tyres may also contact the chassis during full a
Lock turn
Besides what Fran offered regarding inner sidewall contact, watch your overall diameter. It looks like you're on the ragged edge at ~24.7" before you start rubbing the fender/sill area during a turn. Will vary depending on your body alignment but something to consider.