drive shaft info

[easyrider]

I'm progressing slowly but surely with this truck. I am now putting the transmission to engine and into truck. My question is: Is the spline in the automatic transmission the same as the one that is in the 3ott transmission that was in the truck originally? Will I have to replace the yoke on the drive shaft to make it work? And, will the drive shaft fit length wise? Is the engine/3ott drive shaft length the same as the engine/auto that I am installing?? Lots to figure out and the best way to do that is ask someone who had done this before. You guys are an encyclopedia of knowledge and with the years of experience you have, I trust your lead. Thanks in advance for all your help and advice.

[bigmac73]

count them or take the yoke and fit , I am pretty sure they are the same as back high school I swapped the 3 OTT to a Turbo 350 do not think i had to swap the yoke ,but that was 30 years ago

[easyrider]

would the length of the drive shaft be the same?

[Wrenchbender Ret]

If the auto trans. is a TH400 it won't fit. The only way to tell about the length is to try or measure them. There are different length transmissions. Its very doughtful the length is the same.
George

[easyrider]

I think mine is a 350 trans. I guess I'll have to wait until engine/trans is in place and take the measurements. Thanks for the information!