try
www.tciauto.com for trans lenghts. i think you will find the short 350t(6" tail), is 11/16" shorter than a short tail 400T,& thats enough that the same lenght shaft wont work with a 1 pcs shaft. on a 2 pc shaft , with a slipyolk in the middle, i have spilt the difference tween the trans & center slip......& swapped a 3spd stick for a 400T, & also the other way without problems. crazyL