correct 4 spd shifter

Will be getting shifter rebuilt or replaced - what would be correct for 1968 4spd 383HP Barracuda? What is in there now likely came with 1971 donor car that provided 18 spline hemi 4 spd. buty I do not know what it was. Will Brewer have it? Getting new clutch kit and flywheel cleaned up balanced. Any recommendations? - don't really need HD clutch..No lockout now, maybe a dumb question but if we went with a shifter with reverse lock-out would it mean opening trans case? thnx