need help choosing 340 cam

340mopar, welcome aboard.

That cam should do you into the 12's, no problem. I'd rather the 296/.557/110 cam. Alot will be in engine and chassis tune.
Run the 1.6 with upgraded springs for 563 lift. I'd also port the heads. Also, a 4.30 gear and 27 inch tires as wide as can be fitted in.

Loose weight! Behind the bumper is the steel bumper designed to take the impact. Drop 40+ lbs. there, re-attach the chrome bumper with washers for spacers so it goes back where it was. A fiberglass bumper would be better. Front and rear.

Move battery to the trunk.