dgas -
Sounds like you have a good grip on what you know and what you like. So, yes I agree you would be better off passing on it with the poly, rust issues and vinyl top.

For anyone who likes 66/67's the car isn't such a bad deal, especially if the trim is all there and good. An engine swap is easy and sheetmetal can be found. I believe I have seen repop QP patches for sale (?). A big hurdle and cost is the trim. A lot of 1-year-only parts for the early Satellites (65, 66, 67).

Regarding popularity and value of the 66/67's, you either love em or hate em. We bought our '67 convertible in excellent condition with factory 383/2bbl (1-of-107) from a Mopar guy who simply didn't like it and wanted a '68. It cost a lot less than $10k.

Best, -Art

65 Satellite hardtop 361/4bbl console 727 2.76
67 Satellite convert 383/2bbl column 727 3.23
67 Lancia Fulvia Sport 1.3 Zagato. Alloy body, 1.3L V4 DOHC 4-spd
67 Lancia Fulvia Rallye 1.3. Alloy panel, 1.3L V4 DOHC 4-spd
71 Alfa Romeo GT Junior 1300 Zagato, 1.3L 4cyl DOHC hemi 5-spd
82 Alfa Romeo GTV6 2.5L SOHC hemi V6 5-spd transaxle
75 Maserati Bora US spec 4.9L DOHC hemi V8 5-spd ZF
77 Maserati Khamsin Euro spec 4.9L DOHC hemi V8 5-spd ZF
07 Aston Martin DB9 6.0L DOHC V12 6spd transaxle