John - (and others)
As I thought about your comments, I decided to look further into the kickdown linkage adjustments. Crawl under the truck with me and go to the kickdown lever on the trans: the rod that comes down from the engine has a "slide-adjustment" block bolted to the rod with a spring behind it. Well it was adjusted "OUT" towards the rear of the truck. This had the kickdown lever on the trans engaged by about 1.5 inches. I undid the rod/block and the kickdown lever sprung forward towards the radiator. As I examined it, it had the free travel you mentioned before it had spring tension. I removed the spring from the rod and slid the block forward and that allowed it to align with the kickdown lever when it was forward.
I now have a 1st to 2nd shift at about 18 and a 2nd to 3rd at about 30.
Considering the 4.10 gears, I think this is a good shift point. It feels a little "long/late" compared to my Superbee, but I'm guessing it [the Bee] has 2.91 gears or so.
All in all, thanks to you and others, I've brought the shift point !WAY! down!
I think I'm pretty satisfied at this point...
Unless you think it can still come down some???
Thanks again everyone!!
Ron