The stock heads will choke a 347. Need more info to determine a cam. Auto or stick and what converter if auto? Gear ratio in rear end and rear tire height. and what car is it going in.The HP of a 347 can really vary. My 347 dynoed 460Hp at 6,000 RPM with a mild cam, with your stock heads you will be nowhere close to that. Are you really set on the stock heads and if so why?I am building a 347 stroker kit. im going to use the stock heads and an edlebrock rpm air gap intake eldebrock preformer carb. im not sure on what cam i should go after, and i want to know about how much hp? and suggestions? thanks.
Definitely agree with this. Stock unported heads are so restrictive they choke 302's lol.The stock heads will choke a 347. Are you really set on the stock heads and if so why?
Well, if you do a roller cam the stock foxbody cam from the 87-93 5.0 Mustang will be great. I would just look for a running 5.0 Mustang engine and call it a day.Its an auto, and i think im going after a 1500 stall speed coverter. its a stock mercury cougar, and yes, a very tight budget. eventually i plan to but a set of good heads, but for now the stock ones were in decent condition.