4 speed synchrowhatt

hi

what is the best synchronizer for the 833 for performance use but not all out racing ?

what trans fluid ?

thank you !
i

Everyone has a favorite, this is the one I like and it is GL4 .
https://www.pennzoil.com/en_us/prod...nchromesh-manual-transmission-fluid.html

Upgrade to the 71 up syncro assemblies , I bought a refurbed set from Brewers .

For Oil 20/50 Full synthetic Motor oil and a 6 oz. bottle of ZDP zinc additive .

I didn't know that was still available .

1971 and later complete synchro assemblies, Type F aft on the fluid like they came with the early to late 1960s