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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: Aug 2009 Posts: 24 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2009 Posts: 24 | I am working on a 54 1/2 Chevy 6400 big truck. Trying to find out if the engine is a 216, 235 or 261. The engine code is
006352IF55N. Which engine do I have?
What do all the numbers stand for?
Also, where is the block casting number located? | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | Here are the locations of various engine casting codes. That engine serial number is for a first-series 1955 engine. 006352I = 0063521 ? = 62,521st truck off the assembly line (63521-1000 = 62521) F55N F = built in Flint, MI 55 = 1955 first series N = 6000 series truck Does it look like your truck has been repainted? What is the color of your grill (and the color of the inner part of the middle grill-bars)? What is the code on the door-plate (between the hinges on the driver's side of the cab)? Can you post a photo of the hood side-emblems? The block (and most likely head) date casting codes will most likely indicate 1955. | | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | My book shows the N suffix as a 261, optional on 6000, 2 ton.
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