the only thread I could find in relation to my question is this thread.
http://67-72chevytrucks.com/vboard/s...=640506&page=2 he does just as I suggested and cut the some off the rear shaft and use the stock adapter then bolt up his 205. thats if the 4l80e in fact has a full splines main shaft. I guess we will see when I remove the motor and trans from this beast