Im curious as well I just ordered new uppers and lowers from you guys and would like to know if Im getting the new design.

I believe everything from this point forward is the new "caster slug and Delrin bushing" style arm. They are being powdercoated now, so they won't be ready to ship for till the middle of next week at the earliest.

So are the news arms shipping?

I am buying the Strongarms for my 67 Bel Air. Are these changes incorporated? If not, will they be?

The first Gen F-Body arms are now shipping.

The Tri-5 Chevy will likely not get this change as the OE upper and lower cross shafts are "special". The upper is bent in toward the motor to clear the shock mount, while the lower has a wonderful bolt pattern that is not easily duplicated. As such we use the OE cross shafts on these vehicles.
We are looking across the board at our applications list and trying to get as many cars as we can involved in these updates, but some are limited as to how far we can go.

What about for the second gens??? :hello:

The second gen is likely going to get these updates, though it will take a little while.

Do the 65-70 B-bodies have the delrin bushings?

Here is a list of vehicles that are currently shipping with Delrin bushings and caster "slug" cross shafts:
78-88 GM G-Body
64-72 GM A-Body
67-69 GM F-Body
68-74 GM X-Body

That is it for now. All other vehicles are on the list for consideration, but have not been completed.

2nd gens, always a bridesmaid never the bride :D