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View Full Version : 1970 M21 Muncie 4 speed casting # detail



rjohns
10-13-2006, 11:45 AM
Does anyone have and original 70 GS 455 4 speed or 70 GS Stage 1 4 speed car that can verify correct casting #'s for the following?
Main muncie case #
Side cover #
Tailstock housing # ( and does speedo cable attach on drivers side ?)
Pics would be nice.
Again,thanks for anyone who can assist.

gd2227
10-13-2006, 03:45 PM
Main case # 3925660
The date number should be something like P0A15B (at least P0 and B)
Speedo connects on passenger's side
I don't have side cover numbers. The above was pulled off a 70 Stage 1 M-21 built on January 15, 1970
Tailshaft:
3857584- 27 spline output
3978764 - 32 spline output

rjohns
10-16-2006, 04:21 PM
Thanks for your input George.
Anyone else have a original 70 big block stick car that we can compare #'s ?
Thanks