Sorry about being late to the dance but I have long suspected that the L on the reproduction engine tags was incorrect. Lima plant as far as I know started producing the 385 series motors in 68 and never produced the FE motors. Although I have seen many 68FE remnants of paper tags none have ever been legible in that area. I do have this off of 69 and clearly you can see the D in the corner on the CJ engine
Think I've got pictures and captions of the Lima plant from the 50's building at least 6 cylinder engines have to revisit
Can't get your picture link to work. If you want send it to me again email and I'll post it if you like. Would like to see since I've not been able to find a paper tag with a D
Looks like 420T.
Would have been nice to know what all the suffixes means.
Do know that there are differences between auto/4 speed with and without AC, but think there is more than that!?
Yes different coding for different engines since they were assembled differently at the engine plant. You would need to focus (would make the task easier) on a particular year and engine type. Some years you would have auto and manual, with Thermactor, with IMCO, ...........