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View Full Version : 350/th400 to muncie questions



DEADMANSCURVE
03-06-2005, 06:47 PM
picked up a very nice looking 2:20 first m-21 yesterday and the guy threw in a good low miles centerforce 11" clutch disc and matching gm rebuilt pressure plate . the car was originally a "v6 three on the tree" so the clutch linkage is all there and appears to line up ok etc . the question is : i picked up a new lakewood bellhousing pkg a while ago and was wondering what kind of issues i will run into installing that ? i don't really need that much bellhousing with the "a" motor ( basic clutch pkg ) but the "b" motor ( good flywheel and clutch pkg balanced with motor ) will have some extras and figured i may as well get it in there and set up correctly the first time . thanks for any info / tips . del

greg davis
03-07-2005, 02:30 PM
The driveshaft length from a TH350 and a Muncie 4 speed is compatable.

You need to determine the output spline of an M21. I have read they have both spline counts.

output spline:

TH350---27

TH400---32

M20-----27

M22-----32

of course any combiantion is possible with the mixing of parts so first you need to verify your M21.

DEADMANSCURVE
03-07-2005, 03:22 PM
my main concern is upcoming problem areas with using the lakewood bellhsg as opposed to the oem style . got a ford 9" in the rear so i was planning on having to have a shaft made anyway . there are a couple good local shops that i can get a quote from to compare to places like denny's in buffalo . del