Friend emailed the following to me. No mechanic by any means so maybe someone else has an answer...
Why are the front driveshaft yokes not in time or lined up like other driveshafts? Even the rear one on 151 and A2 are lined up. I always thought it was a balance thing for the yokes to be in line. That has bugged me for 41 years.
Front Shafts
Moderators: rickf, raymond, Mr. Recovery
Front Shafts
1960 M151 Run #1
"There is one nut on a M151 that is very difficult to remove....." - K8icu
"She ain't a Cadillac and she ain't a Rolls, But there ain't nothin' wrong with the radio" - Aaron Tippin
"There is one nut on a M151 that is very difficult to remove....." - K8icu
"She ain't a Cadillac and she ain't a Rolls, But there ain't nothin' wrong with the radio" - Aaron Tippin
Re: Front Shafts
Because of compound angles. The driveshafts are not centered so they are working on two planes at once. Now he can chase his bugs away. 
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone