Upper Valve Spring Collar question

[BigLakeBob]

Am I correct where the one on the left is 18221-36 (used on EL, FL & FLH from '36-'80) that has an overall height of approx. .390 and the one on the right is 18219-81(used on '81 & newer shovels) that has an overall height of approx.
.330?
I am asking assuming the collars are being used in a stock cam lift setup and disregarding the years of the 'rotating cap'. Thanks in advance. Bob#6738


While we are at it, of the two lower collars I show, what years was the one on the left used and what years for the one on the right(blurry pic-but has smooth bottom). They both have .580 inner holes. Or is the right one aftermarket? Thanks.

[BigLakeBob]

In case anyone is interested -81 # upper collar is .330. Thanks Dave for taking your time to open a NOS package and answer this. Bob Rice