Some cars hoods are inherently heavy no matter what you do, but trimming them here and there is better then nothing. Wow, 4000 plus pounds is heavy to pull, so i guess that pulling the hood is a no brainer.
The bumper brackets have been removed so at least you got rid of that dead weight. Aren't those the 5 mph bumper brackets?
Wow, fiberglass fenders for a 74' B, where did you get those? never seen a pair.