The short throw one is earlier, up to 36 I think, but not sure. The longer throw is later, on up through the 50’s F-1 pickups.
Measure from the bottom of the pivot ball to the selector tab. Early is shorter than the common years we like.
...I can't help with the shifters (except for a bump), but it's great to see you on here, Paul. Hope things are going good for you and getting better all the time....Don.