If you have a 1936-1956 Ford car or pickup with a big 6 hole fuel sending unit then you need this adapter
 
 
Hardware is included in this great kit
 
 
6-hole spacing going clockwise is 1-9/16", 1-3/16", 1-7/16", 1-3/16", 1-7/16", 1-5/16" for the stock type pattern
 
 
5-hole mounting pattern for new style sending unit has one spacing at 1.38" and the remaining four at 1.25"
 
 
Adapts the 6-hole pattern from '36-'56 Ford fuel tanks to the aftermarket 5-hole pattern