Will the stock 10 bolt hold up to a LT4 HOT CAM car on big street tires, no slicks, and 4:10's, wIth say a SLP clutch??

 

On street tires I would say most likely it'll be fine as long as you don't drop the clutch at 5K on a reall well-prepped track. I still slip the clutch a little rather than dumping it when I launch, and the rear has held up fine. Shock loads are what kills a rear end, so even if you had 500 HP you'd probably be ok as long as you don't abuse it on the starting line too bad.

 

It's a crapshoot. You either got a good one or find out sooner than later.