You can get the collar from Tractor Supply for like $1.50. Or you can pay for a "specific" Mopar shaft collar off ebay for $16.88, lol.
http://www.ebay.com/itm/Mopar-Distributo...tr#ht_792wt_867


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax