The early Cruisers used the pictured screws instead of bolts, what the OP found is correct. M6 hardware is both wrong for '65 and won't work without drilling and fiddling with nutsIf I recall correctly, the front splash guard bolts are M6 x 1mm pitch. As for the radiator shim, the stock setup are the fiber mat pieces. The part number for the fiber mat pieces is 90950-04010.