Question on 4x4 frames and best year (67-72)

[John Fabris]

Ok, tossing around an idea in my head of scrapping my current 67 short Fleet project that I have been collecting parts for, and considering a big block Panel that a co-worker has. Since I already have a finished lowered 67 short fleet, was thinking of picking up the panel and converting it into a 4x4 big block panel (I really regret getting rid of my 67 3/4 ton 4x4 burb).

I am looking at getting a 3/4 4x4 frame to put under the panel and was wondering if any one of the 67-72 4x4 frames (longbed) were better then the other years?

I know that I don't want 67 or 68 4x4 frames but are there any differences or advantages in the 69, 70, 71, or 72 frames?