1st dodge Posted October 4, 2015 Report Posted October 4, 2015 My truck has the flathead 6 spitfire with the code C7603 on it. What size engine is this? And would it have come in the truck? Thanks Quote
Don Coatney Posted October 4, 2015 Report Posted October 4, 2015 The Spitfire head is a Chrysler only head and is not original to anything but Chrysler. No trucks ever had this head. Quote
Reg Evans Posted October 4, 2015 Report Posted October 4, 2015 Is there a number on that raised area just above the front freeze plug in your photo. If the engine is original it should start with a T. Quote
1st dodge Posted October 4, 2015 Author Report Posted October 4, 2015 That number is a c7603. Can you tell me what size the motor is? Quote
Dodgeb4ya Posted October 5, 2015 Report Posted October 5, 2015 Originally it had a 236 CI engine. It still could be and looks like a truck block with a chrysler head. You need to measure the piston stroke by removing the 7/16" hex plug over #6 cylinder and inserting a straight 1/8" thick solid wire about 12" long. Drop it straight down on to the piston and turn the engine over by hand using the fan. Turn the engine over till the rod just stops dropping down.... mark the rod level with the head. Now turn the engine over more to cause the piston to push the rod all the way up till it rises no more. Mark the rod level with the head. The measurement between these two marks is the piston stroke and will tell you what size 25" engine you have. 236 ci. has a 4-1/4" stroke 251 ci. has a 4-1/2" stroke 265 ci. has a 4-3/4" stroke This does not apply to canadian or export engines! 1 Quote
Phil363 Posted October 5, 2015 Report Posted October 5, 2015 (edited) The Spitfire head is a Chrysler only head and is not original to anything but Chrysler. No trucks ever had this head. I think Don ... above response ... and THE OIL SOUP on another thread you have are on the right track here ... Check out this link and compare your engine block number to the data here: http://www.t137.com/registry/help/otherengines/cengines.html If the number on the engine block is C 7603 that would indicate ( I believe) that block is from a 1936 Chrysler car. The site does not give the engine displacement data but other forum members can figure it out once you ID the engine make, year and what type car it came out of. Our truck engine block numbers begin with the Letter "T". Phil Edited October 5, 2015 by Phil363 Quote
1st dodge Posted October 5, 2015 Author Report Posted October 5, 2015 I measured the stroke and it's 4 3/4" so I guess it's a 265? Quote
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