Camshaft suggestions

Yes, it's easy to overcam with stock 318 heads. Cam recommendation based on porting 318 heads and 9-9.5:1 compression. It would like a quality factory type high stall converter. Nothing wrong at all going down to a smaller split grind cam, just keep a lot of area under the curve. If it were me, I would either lose the flowmaster 40 cans and the associated drone and put a set of magnaflow 3.00 inch mufflers on or install a set of 3 inch dynomax race bullets after the Max's for resonators (the cheaper way until paper thin flow diverters rust out in the Max's), but that's a matter of personal taste... Your car, do what makes you happy on the details.