OK, here's a shot:
The wheels have a 7 1/8" (f) and 10" (r) rear spacing.
I think the bolt pattern is 4.5" dia. x 6 lugs.
18" 5-spoke "fat-boy" wheels probably weigh another 3# ea. more than the '96-'98 cast or forged "skinny" wheels. The old three spoke wheels weigh about the same as the '96 cast/welded ones.