I would be worried with only 1/2" clearance for the tire, that's really pretty small. You may be able to get more clearance by rolling the lip inside the wheel well if that's the closest point.
500 Hp will overwhelm a 195 tire, they'll spin and you won't get much forward motion due to the lack of traction.
The B body axle is wider than an A body axle, that is what the tire is so close to the wheel well. You might find a custom rim that will work, I don't know. To make the rear end fit, you are probably going to have to move the spring perches inward a bit. The only way to make more room while using the B body axle for the tires is to have the axle housing narrowed then custom axles made to match that width. The other choice is to find a A body 8 3/4 (which is probably gonna cost more) up front but is closer to a bolt in (other than driveshaft length).
500 Hp will overwhelm a 195 tire, they'll spin and you won't get much forward motion due to the lack of traction.
The B body axle is wider than an A body axle, that is what the tire is so close to the wheel well. You might find a custom rim that will work, I don't know. To make the rear end fit, you are probably going to have to move the spring perches inward a bit. The only way to make more room while using the B body axle for the tires is to have the axle housing narrowed then custom axles made to match that width. The other choice is to find a A body 8 3/4 (which is probably gonna cost more) up front but is closer to a bolt in (other than driveshaft length).