I have looked at installing that trans in my burb also. The standalone ecms are not that expensive. And with the transgo kit you will have to shif every gear manually. With the computer you can program the shift points you want to save on gas and not have to shift manually. You also dont have to do any programing with the ez-tcu if you dont want to. Seems like a 700r4 would be easyer swap then puting a 4l80 if all you are looking for is mpgs.
Link that may have length info you need.
http://monstertrans.com/store/news/2...surements.html