Re: 3 on the tree
[QUOTE=raycow;49507]If you get an SM420 transmission (used 67 and earlier) it will bolt to your present bellhousing with no modifications needed. You will need to replace the driveshaft, and, of course, cut a hole for the shift tower.
If you get an SM465 (used 68-up), you will also need to have the bellhousing center hole bored out to approximately 5.125" to accept the front bearing retainer. This is a job any machine shop should be able to do.
Ray
Do I need a new clutch or tailshaft? Are the splines the same?
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