Not an A-body but it has a 440

Some of you may remember the thread I started a while back about the '72 Polara 440/727 for sale in my area. Well I'm about 90% certain my cousin is going to get the car and we're thinking about initial upgrades. The engine is all stock, so what exactly did it come with? Forged crank, or cast? 6-pack rods (I know they are heavy)? How good are the stock heads from this year, and did they have hardened valve seats? What kind of compression? Maybe stock cam specs as well?

It only has 41k miles so the bottom end should be fine. I was thinking a Performer intake with a rebuilt ThermoQuad, multi-spark ignition, and a nice TTI exhaust (2.5" or 3" ya think?) off the stock manifolds, basically like I did with my Duster only in this case it's a 440 C-body instead of a 318 A-body. Also we plan to drive the car pretty often until my cousin gets a B- or E-body to drop the engine into, so decent gas mileage will be a plus. What might it be after these upgrades if the car has stock gearing/trans?