i came across this thread because i needed to research the size of the u-joint. thought i'd update with my findings:
the small u-joint is indeed the precision no. 330; Spicer 1410 series, plain journal 1.188"D x 4.188"W. Napa PN: NPJ330
the large u-joint is indeed the precision no. 332; Spicer
1500 series,
bearing plate style 1.562"D x 4.562"W. Sermis could not find this joint on the link above because it is a 'BP' style, and the chart was for 'OSR' (Outside Snap Ring) style.
Spicer 1500 BP Style
now, what
I need is a conversion u-joint that combines these two: Spicer 1410 to 1500BP. they don't make one...