lord I appologize for my next confession but... well here it is.
I've been a Ford guy pert near all my life...
Whew, good thing i put my flame proof suit on cause I feel the heat comin! :grin:
Anyways, yeah i'm familiar with some of the aluminum and fiberglass tricks too.
Take the Ford thunderbolt for instance...
Wiki quote in regards to the 64 ford fairlane thunderbolt:
"Fiberglass hood, doors, fenders and front bumper, acrylic glass windows, and other lightweight options including deleted rear door window winders, carpeting, radio, sealant, sun visors, armrests, jack, lug wrench, heater, soundproofing, and passenger side windshield wiper."
NHRA decided they wanted all stock class cars to wear metal bumpers so Ford started hanging aluminum ones on the T-bolts from that point on and existing owners were also supplied with an aluminum one to replace fiberglass front bumpers.