I have an 86 gt with a 93 cobra block in it. the motor was rebiult about 8 months ago and i just turned 13,000 miles and the crankshaft broke in half right behind cylinder 2. idling down a hill in a neighborhood. I came to find out the timing was advanced 12 degrees when it should have been retarded 9 degrees. I know detonation was my problem and i was hitting a feul cut. The block is 30 over with stock rods and 10 or 10.5 to 1 flat top pistons with 2 valve relifs. It has a double roller timing setup with an e303 cam. Stock cobra upper and lower intake and gt 40 heads. Im looking at going with a scat low compression 347 strokerker or just putting it back together with a new stock crank. the main thing im curious on is how much horsepower will a stock uncut crank hold? Will a stock crank hold up on 10 pounds of boost with a safe tune?