Geno,
I think that if you can keep it under $150 Powder Coated and ready to bolt in, you have a winner.
Losing 10 pounds isn't an easy task once you have taken all the power options and bumpers off one of these cars. I'd pay that much (and did for a mini-starter) no question.
The suggestion for Dual exhaust is a good one. The 455 V8 Regal guys would like that too. Heck, your idea would work on any G-body! Even the Chevy SS boys would like a stronger lighter crossmember......They'd still be a bunch of slugs, but lighter stronger slugs!!
How soon can I get one? I'll place my order now.
DR