Re: Will fixing all these faults add value to re-sale or trade-in ?
If you're going to fix it, keep it. Otherwise i wouldn't bother. Dunno what state you're from, but in WA, any CFI EB, even in mint condition, isn't worth more than $3k realistically.
By the time you fix the rust and paint (you're basically talking about a complete respray), convert it to MPFI and do tint, interior, tyres, and the windscreen, you'll have spent more than you'd get, just about. You might as well keep it, chuck in a manual and a 3.23 or 3.45 diff, and go kill Commo's with it :)
Wrecking - I could probably get $300 for the motor IF it was still OK. Lights - $50 each for the headlights, taillights maybe $30 each.
Glass/doors you probably won't sell. Same for all body panels.
Box - $2-300 if somebody is gullible, they're not really worth crap IMHO
Maybe tyres if they're good.
Diff's not worth anything either.
Radiator - $80
Total of something like $6-700, you could probably manage a grand for it as is and licenced, so if you hate it that much I'd just flog it off. General tidy-up and replace the mirror, maybe you'd manage $1500 or so.
My advice, anyway, sorry to be so pessimistic about your car :(
Proud TQE Operator and President of SEFAG - the Society for the Elimination of Ford Automatic Gearboxes
Pacemaker headers + 2.5" exhaust
EF Fairmont interior
Lowered King springs
5 speed manual
Newest mod: EF Ghia wiring loom and dash