Yes.. 58" is about what works without moving springs etc...
Yes.. 58" is about what works without moving springs etc...
Your wheels have 1" negative offset so a 58" rear puts the center of the tires at 60", about the same as stock. The 10" tire would be about 70" outside and 50" inside. Most of these cars have 71.5-72" between wheelwell lips. The tubs are 46.5" and springs are 48" outside so you should have about 1" between tires and springs. You could actually go with a 275 tire if you could get it inside the wheelwell. As long as you can get wheels with the right offset you can go with just about any reasonable rearend width, if you can center the tire in the wheelwell. I've had guys asking me what rearend width to use and I tell them to choose a wheel and tire first.
56 Nomad, Ramjet 502, Viper 6-speed T56, C4 Corvette front and rear suspension
Other vehicles:
56 Chevy 2-door BelAir sedan
56 Chevy 210 4-door sedan
57 Chevy 210 4-door sedan
1962 327/340HP Corvette
1961 Willys CJ3B Jeep
2001 Porsche Boxster S
2003 Chevy Silverado 2500 HD Duramax
2019 GMC Sierra Denali Duramax
I've seen 275's on 56's/57's but the fender opening on my 55 (bottom edge) distance to the brake drum is super tight. Perhaps if I dropped a shackle and got the rear down a bunch more 275's could be squezzed in. As I stated before, the 255's are really hard to get off/on (helps to unbolt the lower shock and torque the shackles downwards).
If you move the springs under the frame, a 15 x 8 wheel with a 3 3/4" back space, and a 58" mounting surface to mounting surface rear end you can fit 295 50R 15 BFG T/A's. In order to mount or dismount the wheel and tire you need to undo the shock and any traction bars and deflate the tire. Then a bottle jack between the bottom of the frame arch and the top of the rear axle tub and the wheel and tire fall right off.
This is the best picture that I could find, but it is doable.