well the A body is a full frame steel car mine was 3650 i think from there with a iron bbc street driver my tub out 66 with glass hood and gutted and some hole saw work with a all iron block with a full steel floor pan no inners and race seats and a alum rad with no front core swap out for small tubing put the car to i think 3200 or so that was 20years ago then the car had the floor cut out all alum and a alum head 572 with engine set back with no steel fire wall and not much cowl with every thing cut out door inners fenders and polycarbonate side glass with wilwood brakes and may other thing put the car to 2900 or so with me in it at that time i was about 200 maybe i could of got it down more but it was about as much as you could with a steel rework gm frame and all steel body but a glass hood