8 1/4 will it hold up?

i know this is on here somewhere but i didnt find it. in my scamp i am puttin a 360 horse 360 and a 4 speed in it. it has the stock open rear end. its a 8 1/4 and if i keep it i will put a sure grip in it. will it be ok like that? or do i need to spend the extra money on a 8 3/4? i will just get bfgoodrich t/a's and mainly street use so they wont be crazy sticky. i want to get cal tracs and mini tub it to so it could get good traction down the road
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