The weight from doors comes from the glass, window mechanism and inner panel. My doors are completely stripped and have the metal inner panel cutout. They weigh hardly anything. Also after 73 an inner box was added for some side impact protection. This is cut out on my 73 since I have a rollcage doing that job. Also I believe the minimum weight for E-Mod is 1500 lbs. Without a tube frame it is hard to even get down to 1900 lbs. with the six cylinder. I think the SCCA should have a class for V-8 swaps with a more realistic minimum weight. Let's write letters. Also in F Prepared you must keep the metal door. I don't know if this applies to E-Mod.