Question regarding proper installation of upper shock bushing and torque

Been searching around and having trouble confirming two pieces of information. Quick information, I removed my shocks and noticed that it was using a two piece upper shock bushing and had the incorrect ID, in turn allowing about 1/4" of 360 degree motion in the shock mount itself. This worried me and after looking in to it, many threads i'm finding have incorrect information where someone is asking about upper SHOCK bushing and is told to use a two piece STRUT ROD bushing instead.

shock 1.png
coming straight from the 1964 fsm, and to confirm, my 1964 plymouth valiant would NOT require the lower-upper bushing in the "(Plymouth)" drawing correct? I know many people move to a different design but I do not wish to do this and have already purchased MN38100 - 1964-74 Chrysler, Dodge, Plymouth; Upper Shock Absorber Bushings; Pair and these seem to be the correct fit, yes?

Also and my main concern, is how to I properly torque the upper shock nut down?? I've read everywhere that it is 25ft/lbs and that's great but I feel like I am just compressing the bushing farther than it should go before i'm getting close to having any tension for torque readings on the nut. Additionally I have a little retainer nut that is not shown in the original fsm diagram. I've listed the fsm process below but I don't want to just go torquing away on the bushing until I can confirm the proper process. I've seen to compress the bushing until it reaches the width of the retainer washers but there isn't any SPECIFIC accurate measurement listed.

shock 2.png

Wanting to get everything done correctly and just wanted to double check with everyone here before proceeding

-kiyoshi