What year is your truck? I did this swap on my 99' earlier this year, search under my name and you'll find the thread.
I used the factory style o-rings on each the TB and UIM, both sealed great w/o any issues. I eliminated the EGR completely:EGR valve, tube, DPFE, and an EGR sensor at the back of the manifold are all eliminated.
As for the vacuum lines, I just moved them around to get the fitament I was looking for. All the lines I needed were there from the factory, the lines and connectors are in different spots now. For example the vacuum line to the FPR is now routed in front of the UIM rather than around the rear.
99' Ranger XLT 4x4 Ex. Cab. Lowered 2.5"/2" (Removed blocks & 08 Keys) 3.0FFV, 5spd, 3.73's, 245/70-16's on OE Teardrops. Clear corners, 06 Tail Lights, Tinted Windows, Explorer OHC, U/D Crank Pulley, E-Fan, 02 Composite upper, 05' Ranger half-shafted TB, EGR Delete, 06 Mirrors, Sound Deadened w/Raamat.