A quick craigslist houston search finds this: ALUMINUM CORE SUPPORT POWDERCOATED BLACK NEVER BEEN INSTALLED $300; VFor sale is an aluminum core support form a 1979 Pontiac Grand Prix.
The car it was pulled from was not wrecked. It's in the same condition as how it came out of the donor car, which is a very good condition, but it will need to be cleaned. It is stamped ”A” for ALUMINUM.
The stock steel core support weighs 22 lbs and the aluminum weighs 13 lbs. Since it is aluminum it can be polished to bring out a shine or painted black for a stock look.
This will fit any gm a/g-body from 1978 to 1988 with little or no modification. It will fit 1978-87 Buick Regal/Grand National, 1979-87 Chevrolet El Camino, 1978-83 Chevrolet Malibu, 1978-88 Chevrolet Monte Carlo, 1978-87 GMC Caballero, 1978-88 Oldsmobile Cutlass RWD, 1982-86 Pontiac Bonneville, 1978-87 Pontiac Grand Prix, 1978-81 Buick Century, 1978-81 Pontiac LeMans/Grand Am. g-body. gbody.
If you have any questions call. 832-264-5566.
Hope that helps.