Ford GPW and Willys MB Hood Blocks, and their differences
Pictures of the reproduced hood blocks
Style #1 hood blocks, rubber, early (pair)
Style #2 hood blocks, rubber only for end '42 early '43 (pair)
Style #3 hood blocks, wood, for '43 Willys only (pair)
Style #4 hood blocks, standard (wood with fabric insert) (pair)
Pictures of original hood blocks, and the dates for correct style...
Willys
1
Contract W-1 Nov. '41
prior to serial n. MB103546
early type A-2922 (green rubber block with channel in the middle)
2
Contract W-3 May '42
MB 125809 - MB 163750
rubber ( no "A-..." code known )
3
Contract ...
in use in 1943 for a short period
A-3780 (hardwood, it replaced the the same model black rubber one )
4
Contract W-4 June '43
after MB 218345
Std. type A-4683 ( wood with fabric insert )
Ford
I believe Ford used only the 1st and the 4th Willys styles.