73 2.0 part out or not---the short story

[bryanf]

I think my posts are too long--so here's the short version:

I own a 75 2.0 that is in pretty good shape but tired.

I bought a 73 2.0 that had a low speed front end collision that damaged the front end--but has a rebuilt engine and tranny.

I'm now having second thoughts about swapping the engine and tranny of the 73, because the 73 is in really nice shape (except for the collision--front end pushed in 6-8 inches, no other obvious damage).

What would a nice '73 2.0 be worth if it was rebuilt? What would it take to fix it? Is it worth it to fix the '73? I feel guilty dooming such a nice car to the junkyard.

Excessive details are in my previous verbose email.