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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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#59893 05/01/2006 3:54 AM | Joined: Jul 2004 Posts: 102 Member | | Member Joined: Jul 2004 Posts: 102 | I have the opportunity to buy a 1988 GMC r20 (3/4 ton). It has a 350cid and automatic transmission in it. My question is exactly which transmission is this?
The VIN is 1GCGR23K6JJ131961 and it is the original engine and transmission.
I’m looking at putting this combo (as well as other parts) into my '48 chev.
Any pointers as to where I might find this info? (Unfortunately I didn’t think to get the transmission casting numbers while I was looking at the truck)
Thanks for any help!!
1948 3600 thriftmaster
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