8.25's are good for about 350+ HP , if you run a mildly built 318 you will have no problem. they will even stand up to a 340 auto or a 360. A posi is even stronger than an open rear.
Mines a 360 and not too built up ,but it doesnt sound all that mild.I didnt build it,but Im not going to be rough on it(daily burnouts,taking it to the track,etc)
Besides,here its alot of points taken off your license for exibiting speed,so I have to be careful ,lol
I want the engine and the car to last so ill mostly drive it casually.