I'm not all too familiar with 1st gen Escorts (up to '90) but the engines were always being refined, so the 1.9 from your car would be a more advanced version of the '88's 1.9. The 2.0 in 3rd gen ('97-'00) Escort LX's is actually the same 1.9 with a stroke increase and other minor refinements. As for GT engine's in LX's, there was an LX-E offered sometime between '93 - '96 (I think...don't quote me) that had the same 1.8 as the GT. The best Escort engine is, of course, the 2.0 Zetec found in ZX2's.
Some GT's had 15" 7 spoke wheels that I love an plan on getting, others had a twisted 5-spoke 15". Either wheel will fit your car perfectly.
I have seen Escorts with trailer hitches before, but I would check the manual or talk to the local trailer hitch guys about it first.