Nice car, looks like your having fun with the build.
Just an FYI, your 72' engine (as do all 72-73 340's) have a special cast crank and is externally balanced, hence the counter weight on the damper. If you look on the counter weight, it will read "use with cast 340 crank only" or something like that. My 72 340 also came with 360 heads or "awj360" heads.
My wife gets the same looks about my car....
