What's cool is "resotmods" are still commanding good money if DONE RIGHT! Look at that backdated 911 that went for >$200k on BAT last week!
To me, a done right restomod E9 would be:
- 3.5L engine w/EFI or triple Webers, or S38
- 5 speed
- sanden, R134 AC retrofit
- Recaro or equiv seats but with OEM seat pattern
- front CSL or 635-style spoiler
- suspension updates (CN or coilovers)
- BBS or Alpina wheels
- tasteful wood trim
You couldn't get away w/the above on a Alfa GTV or Merc 280 SL or SE, but thankfully on BMWs an Porsches, done right, can almost get your money back.