engine specs

Using a quick guess of 6ccs for the valve pockets, and a typical Felpro gasket, it comes to 9.6:1 for a stock stroke and +.030 overbore. The mopar factory cast cranks are still pretty strong. I'd put a guestimate of 450 horsepower using lightweight pistons and having things competition balanced, plus having the main caps studded. The Mopar Performance cast 4" stroker crank can go a bit higher, there are several making over 550 with lighter weight rods and pistons. The lighter the weight swinging on it, and the better the prep, the higher amount of power it can take. You can always have it cryogenically treated too. As far as rods, the SIRs and cheape lines are slightly stronger than factory redo with good bolts. The heavier H beams, and higher priced I beams are much stronger (you get what you pay for). I've run stock rods on 340s with 175 NOS shots that made a real 530hp and had no failures. It has a lot to do with careful machining, and proper prep.