I'm 99.9% certain the THM-350 output shaft spline counts remain the same for the 70's and 80's, 2WD OR 4WD.
You can replace an 80's 700R-4 with a 70's THM-350 in a 4X4 application and keep the driveshaft length the same by using a tranny with a short 2WD driveshaft, and cutting off part of the splined area, then mate it to the transfer case using an adapter that's about 1-2/2" or 2" thick. So the splines ARE the same. (You wind up with an output shaft that's a little longer than the factory part, but shorter than the shortest 2WD version.)
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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