The stamp pad reads as follows:
0582891= Production Sequence Number as assembly line assembled.The first on on line would be 1001, so yours is the 582,890th assembled on the line.
f = Flint,MI
54 = year
z = 235 cu.in. Reg.engine 115HP 7.5:1 comp.ratio 1 bbl carb Std.Trans.
The block casting number will be raised numbers on the side of the block.The head casting number is on the top but under the valve cover. A good cleaning is sometimes necessary to see the numbers clearly.
If you can read them, look in the Casting Number link to the left of this forum page.
Hope this helps.
