G'day Rich.
Copied from the DF web page.
65-5391 Fork springs, pair, s/car, see table below A 1950-63
89-5036 Fork springs, pair, solo, see table below A 1950-62
65-5391 19.5 coils of .212" diameter wire, 11 1/2" - 11 5/8"long, 34 lbs/inch
89-5036 20.5 coils of .212" diameter wire, 10 3/4" - 10 7/8" long, 30 lbs/inch
Cheers