Which aftermarket coil-over front suspension does the car have?
Mopar A-Bodies come from the factory with torsion bars to spring the front suspension. There are multiple vendors that sell heavier duty torsion bars, but the 225 torsion bars were often used for drag racing, so you could leave them as is and tighten up the adjusters to accommodate the extra weight.
Does the car already have the big bolt pattern conversion for the wheels?
Upgrading the brakes is one of the first things you want to look at, especially with a big block.