View Full Version : Engine Block Serial Number Lookup?

01-17-2014, 01:10 AM
Is there anywhere to find info (specs, origin, which vehicle it is associated with, etc.) for a 6-226 engine by the engine serial number?

I plan to rebuild my 6-226 engine soon in my '58 pickup. I know that the engine in it is not the original one. The block was painted red, and I was told that red indicates that it was built for higher altitude (or some special purpose). Just trying to make sure I do it right.

UAL 213
01-25-2014, 12:08 PM
Engine block serial numbers for high-altitude are 905574 with 73 in front of thermostat.

01-29-2014, 11:56 PM
Yup. My engine is a high altitude 7.3:1 compression ratio. Thanks.

Another question: what is the difference between the 6.86:1 and the 7.3:1 engines (besides the compression ratio)? Some parts must be different.

Found the answer: the head is shallower, allowing for a higher compression ratio.