Rebuild or replace?

I would consider brakes, suspension, better tires, and subframe connectors (times 100 because 'Vert) a must have even if there is no engine in the car.

So what to do really want to do with the car and how much to you realistically want to spend?

With the given info I'd vote 5.2 Mag, 4bbl, Doug's or TTI headers and enjoy. Or lube the Visa Platinum and go balls out Hellcat swap.