The DP4B looks stcok and is a good intake. As far as cam, try the summit 488 for a good cheap cam, or check around with the pure stock guys and see what they are running. Of course you'll want a new t-chain set, bearings and so on. If you're going to do new pistons, summit also has a good rebuild kit, I'd think even the cast set would be fine for your application. Those heads should be fine w/ a stock rebuild. As long as they don't need a bunch of work. I'd also bump up your stall...maybe to 2600-2800 and grab a set of 3.91's. That should really wake up that thing.