1953 m38a1 cdn

[BCA]

CFR's have the format YY-X _ _ _ _. YY is the year that the number was assigned (not necessarily the factory date of delivery or manufacture). I have suggested previously that the "X'' is a digit that represents a class of vehicle. The following 4 digits allow a sequencial serial number to be assigned to each class of vehicle (0001-9999).
Can anyone confirm this from written documentation?
Based on my observation (vehicles I have inspected, Canadian Army Data Sheets or historical photographs) the following "X" digits were used for the following vehicles:
0: M38A1CDN2 and CDN3 jeeps, 1958 10-passenger bus, some M37's with winch.
1: Various 1956 4x2 trucks, 1956 1/2-ton panel truck, 1956 Ford C500 Fire truck, some 3/4-ton M37CDN.
3: M38CDN and M38A1CDN jeeps (1952-1953 Ford and also Willys M38 and M38A1's that were acquired by Canada).
4: M37CDN, M43 CDN, M152CDN.
5: M135CDN, M207CDN, M211CDN 6x6 2-1/2-ton trucks.
6: M26A1 Tank Transporter ("Pacific")
7: 1/4, 3/4 and 1-1/2-ton trailers (M100CDN, M101CDN, M104CDN)
9: R18 Bombardier snowmobile, 1958 "RAT" articulated snow machine.

Any candidates for "2" and "8"?