Rory don't forget to take those cast pieces off the t case shifter rails so you can use them to convert your rear case to top shift with them.

If you need a different length of forward shift rails to line up with that hole in the tailhousing I have both versions of forward shift I'll drop in the mail for ya.

Any chance of ya tossing a digital caliper on that input of the case so we can compare specs between a340f 23 spline and aw4?  I'm curious if they used the same pressure angle and depth between both versions.  One of these days I'll have to write up a tech article of all the random crap I've learned and am still learning about these wicked trannies.