<VV> Upgrading from 3 speed to a 4 speed

[gbraga at aol.com]

Is moving from a 3 speed to a 4 speed require any changes to the parts needed?
Input shaft, or the shift linkage? or.....

This is for a 64 convertible.  The cam gears are gone on the 84 HP engine, so I hope to replace it with a 110, and change the tranny at the same time if it isn't too much trouble.

Thanks,

Gerry Braga 
64 Convertible
62 Rampside