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Labor Day Putting down your wrenches or time for
MORE wrenching? 
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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: Apr 2004 Posts: 35 Junior Member | | Junior Member Joined: Apr 2004 Posts: 35 | The #HCA939219 is stamped on the block down by the distributer. I tried to find out what size motor this is but it wasn't listed in the casting numbers. Anybody know how to sipher this # ??
Also, on the rear end, stamped on top between the two ribs are the #'s "TL727" and "N657". Do these tell me what ratio the rear end is?? If so, what is it.
Any help is appreciated. | | |
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