The OD of the slip yoke is 1.75in, I got that from measuring the circumference with a string then dividing by pi so that’s probably +/- 1/8th inch.
Yes it is a 340.
I checked the output shaft and input shaft for straightness
I installed good used synchro assemblies
The gears looked great
It has good used brass forks. If you want steel ones they cost an extra $120 for the pair.
It is nice and tight. Pics to follow when I can dig it out.