Re: mk2 Gearbox
Type 9 5-Speed from sierra etc will fit but has a cable clutch so some mods are necessary. Unfortunately I dont think u would get onbe for $300.
The Gearbox from all 1600s is the same as far as I know so Mk1 and 2 Escort boxes from 1300 and 1600 will fit but u will need to check whether it is a cable clutch. Im not sure. If u want better cruising then a diff change could help. You would prob have a 4.1:1 diff so a 3.9 from a GT or 3.7 from an Escort/Capri might help. Not sure which models had 3.7 but i know its possible.
'01 AUII XLS Ute
'65 GT Cortina