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Ring in the new with some quality time with your old truck! A great time to tackle a winter project. If you do not have access to your truck, start your parts list for spring!
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Re: Installing A SM420 Transmission In Big Bolt Trucks 1947 And Older!!! [Re: marvin ribbich] #1330323 Fri Oct 18 2019 12:11 PM
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marvin ribbich Offline OP
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btt

Re: Installing A SM420 Transmission In Big Bolt Trucks 1947 And Older!!! [Re: marvin ribbich] #1335032 Sun Nov 24 2019 01:22 AM
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marvin ribbich Offline OP
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Re: Tired Of Double Clutching??????? [Re: marvin ribbich] #1335125 Sun Nov 24 2019 09:58 PM
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Tony292 Online
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New guy question.... if installing a SM420 into a 1940 replacing the crash box, will o have to change the torque tube to an open driveshaft at the same time?

Re: Tired Of Double Clutching??????? [Re: marvin ribbich] #1335304 Tue Nov 26 2019 12:58 PM
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marvin ribbich Offline OP
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I don't think a SM420 was ever used with a torque tube plus your bell housing need to be changed to except the SM420 if I remember right the bell housing need to be from a 1948-54 engine. My guess the answer to your question is yes. Thanks for asking!!!

Marv.

Re: Tired Of Double Clutching??????? [Re: marvin ribbich] #1335310 Tue Nov 26 2019 02:13 PM
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sstock Offline
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Marvin,
I believe you could get a sm420 in 1/2 and 3/4 ton trucks from 48-54, all had torque tubes bells connected to them.
The question is would his wheelbase change and would his existing torque tube bolt up the the sm420 bell mount.

Last edited by sstock; Tue Nov 26 2019 02:32 PM.

1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
https://www.youtube.com/watch?v=Bli...n05i04t1aokgm4p04jiwgffwhyyih5xbk0h00410
1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration
Re: Installing A SM420 Transmission In Big Bolt Trucks 1947 And Older!!! [Re: marvin ribbich] #1335312 Tue Nov 26 2019 02:19 PM
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sstock Offline
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Attached Files
IMG_1054.JPG (305.37 KB, 57 downloads)

1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
https://www.youtube.com/watch?v=Bli...n05i04t1aokgm4p04jiwgffwhyyih5xbk0h00410
1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration
Re: Installing A SM420 Transmission In Big Bolt Trucks 1947 And Older!!! [Re: sstock] #1335326 Tue Nov 26 2019 03:51 PM
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Tony292 Online
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Is this one for sale?

Re: Installing A SM420 Transmission In Big Bolt Trucks 1947 And Older!!! [Re: marvin ribbich] #1335329 Tue Nov 26 2019 04:06 PM
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sstock Offline
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No sorry.


1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
https://www.youtube.com/watch?v=Bli...n05i04t1aokgm4p04jiwgffwhyyih5xbk0h00410
1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration
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