My 340 in my 66 developed issues :-(

Just so you guys know, now that I have to pull the heads, I'm thinking on camming it up a little more and either having the J-heads rebuilt or getting aftermarket heads already built. I'm up for ideas on that?? Right now it has a purple cam with a 484 lift; that's all I know about the cam from the guy who originally built it. He said if I were to put a bigger cam I'd need a stall. If that's the case, I'll get a stall too