I am sure by now you have realized how simple it is to move these data plates around. Four simple screws on each and for the later M38 four rivets on the screw on main dash panel. No frame numbers were used by Willys either. Engine serials were sequential to engine production and were not matched to jeep serials. There is no way to absolutely ascertain beyond any doubt that any data plate on any M38 was originally installed on that M38 at Willys. So anything we do a half century later to ascertain our jeep's pedigree is an estimated and presumed attempt at sorting out what we see on that jeep today.
You have no dash serial plate.
You do have a patent plate with the number MC58584 which matches your title.
You have a Willys L134 with no serial on it.
You have a survey form that is capable of determining a date of manufacturer, within reason, based on what is found during the survey.
What we know at this point is:
You have an M38 which appears to be MC58584. This serial had a DOM of MAR 1952.
You have a Willys L134 that may or may not be original to this jeep. The
ONLY WAY to determine the pedigree of your engine is with the serial that Willys placed on the pad above the water pump. No serial then no way to prove what jeep, truck, wagon or power unit it came in originally.
As you can see we do not know a lot yet. The survey will enlighten us as to weather or not your M38 is indeed a MAR 1952 unit.
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About your questions:
Did you say its good that they (serial on patent & title) both match or should they not?
Yes it is good that they both match.
Would I be able to have a set of correct dash plates made with only the serial numbers or do I have to do alot more reserch?
You should first complete the survey and email it back to me. Then once we ascertain the DOM of the jeep we can proceed with determining the validity of the current serial number and then decide what style plates and contract numbers to use.
The past actions that can bugger up a reasonable determination of a jeeps pedigree are:
1-Plate swapping done in error while it was in the military.
2-ID changes that happen during a complete government overhaul.
3-Tub swapping later in the jeep's life after the military releases it.
4-Attempts by prior civvy owners to legalize the jeep by buying paperwork and plates from another jeep.