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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Dec 2010 Posts: 64 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2010 Posts: 64 | Hi,
I am putting a later engine in my '36 1 1/2 ton and based on the casting # 3837004 it is a 1955-57 T56X 235-261.
What does the T56X designation stand for and how do I find out if it is a 235 or 261 ?
Thanks,
David | | |
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