PA-22 Tri-Pacer

I've been monitoring the board for a few weeks and have found the
exchanges very educational. I'm hoping now that I can get some direct
help to a few questions.

I'm seriously considering buying my first airplane. My goal was
something that had a low cost of ownership, could seat 4, and was or
could be easily upgraded to an IFR trainer. I don't intend to use it
for long cross country trip, but shorter trips here in the central
Alaska area.

I seem to have found an aircraft that fits the bill for sale locally.
Its a Piper PA-22-150 Tri-Pacer. Looked at it and flew it today. Seems
to have been very well maintained by the two owners (they're moving up
to a larger aircraft). Only obvious issue is the hightime engine (1900
hours SMOH). Was surprised how differently it flew than the 172 I've
been renting.

After that long preamble, I'm gong to have an A&P take a look next week
and wanted to solicit this group's help in identifying specific
questions I need to have answered. I know to ensure all the ADs have
been complied with, but what else should I know about the Pacer?

Thanks,
Scott