I have a 2017 f150 xlt 5.0 supercrew. Bought used with superlift lift kit already installed. I believe it to be a 4.5" lift I have 35s on it. The shocks I believe are the issue with my front tires wearing so was going to put new struts and wanted to make sure I do right. So question is that stock struts have spacers on top but I don't want that, so will a loaded 4" strut from rough country be ok without the spacer??

 

the most you are getting out of a leveling strut is ~2.5". A puck is typically 2" some are larger.
A proper lift kit with control arms , truss bracing, etc... will cost a few bucks. Depends on what you are trying to achieve.
My buddy has a 6" lift on his... he looks like a moron but its what he likes. I would be looking elsewhere than Rough country.
It amazes me how many dolts "cheap out" on lift components.

 

I don't think I'd use anything but a full length strut. Guys spend all that money, and then cheap out using stock struts with spacers. Sorta crazy to me.
think I'd be in contact with different lift manufacturers, and find the correct full length struts for your application.