7.25 rear woes....

I ran my old 7 1/4 open rear for 6-7 years with my 360/350 HP 904 trans. During that time the car saw more than a few smoky burnouts with no problems what so ever, rear tires were 265/60-15. Now I changed to a 8 1/4 sure grip with 3.55 gears.

I may have to risk it since ive searched for a local 8.75 or 8.25 that will fit with no luck.

Im just super paranoid about it breaking soon after i dump what money i have into it.

Gonna be about 4 more years before i have the budget again to do something else to this car and want it to last!