I think it is 1975. Early trucks had only 1 figure for the year. I have to ask my father who worked on those trucks when they were new :-). He knows for sure.

I have a book with Lansing wheels and it shows the following part numbers (Can't confirm 100%, but when the sizes are good you are problably good to go:

load roller
part number 1002897-001
170x83 mm
8 1/2 x 3 1/4"

drive wheel
part number 3000808-001
310x114
7 3/4 x 3"
6 wheel bolts
pitch diameter 96

Both available at TVH

FRES 2.1 stabiliser wheel?
2001463-001
7 1/2 x 1 1/2"
Not available...

Your forklift supplier can order these at TVH