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Old 09-23-2025, 09:48 PM
unruhjonny's Avatar
unruhjonny unruhjonny is offline
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Join Date: May 2004
Location: Calgary, AB, Canada
Posts: 6,835
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Pontiac source toploader three speeds for 1969 & prior high power applications;
Those transmissions used the TH350 output shaft - and they had the added benifit of using (iirc) a GM bellhousing side bolt pattern.

The funny non-GM transmssion in a GM application is the Dodge overdriven four speed used in trucks...

__________________
1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.


1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)