Is there another model harley i can use the rear shocks off of to lower my 90 flhtcu?

And when I changed my handle bars me air valve wasnt connected to anything.... When I pulled the bars i could saw the nipple on the bar where a hose should go but cant find where it could connect to the forks??

 

A previous owner probably removed the anti dive/front air suspension. Hopefully they did it right. Contact someone like progressive suspension and see what models they recommend for your bike. Then look and see what other models they fit. I wouldn't put take offs on any boike that I own as usually they were removed for a reason
John

 

Mine is lowered in the rear using lowering blocks. Was like that when I bought it.
Here are a couple of threads with different ways to lower yours.
On the first one, you'll have to go to the second page and see how Rizzo did his.
https://www.hdforums.com/forum/evo-c...f-tourpak.html

Here is an interesting thread too.
https://www.hdforums.com/forum/touri...installed.html