Yes, this is the biggest possible size. 31" will rub at the frame slightly when full steering.
Maybe, if enough clearance on full steering lock.
265/70R15
265/70r15 112s
265 h/p
If you're referring to the horsepower of the Chevy 265 that's in the 94-96 Caprice, it's 200 hp. The Chevy 265 V8 installed in the 1955-57 Chevy had 162 H.P.
265/75R16
265/40/22 is perfect or 265/35/22 for a little shorter sidewall.
6 cyl has 265-280
6 cyl has 265-280
265-75-15
265/75/16
Depends on the engine... between 190 and 265