I have an 88GT manual.
It goes in gear solid, no slop, but takes a lot of effort. Grinds between 1st and 2nd when it’s cold. And grinds or doesn’t go at all into Reverse. I’m thinking it’s the synchros. Clutch and clutch cable are new.

I’m not sure if it needs a complete rebuild (or even what that includes) or just new synchros.

Where is recommended to do this and what kind of cost am I looking at?