Should I go with the a833 conversion?

Carpet will also need replaced too!

You are correct! That could be one of the more expensive things to replace since normally the rear is replaced at the same time as the front. The thing to remember is even the little things in conjunction with the major parts is gonna add up real quick!

I am doing the conversion in my wagon and even though I sourced the complete transmission and small parts from the donor, I wasn't going to use the old 9 in pressure plate/clutch so needed to buy and upgrade to a 10 inch pressure plate, clutch, and throw out bearing from Brewers. And as mentioned, carpet suited for a 4 speed. Yep, adds up pretty quick!