Budget underhood AC retrofit.

I'm pretty sure the truck system I got the under hood components from had a fixed orifice too. There is no temperature well for me to install it into so I guess I'll try wrapping it around the metal part of the evaporator outlet fitting and then insulate it as beast I can. Thanks for the advice. It will be a couple weeks before I get it charged and then I can confirm whether all this fooling around was worth it.
Cley