Mechanical Fuel Pump Differences

[Wayne Carpenter]

I have a 67 Coronet with a 383 that has a 9-69 casting date on the block. I noticed that the fuel pump part number is different for 383's from 64-68 compared to 383's 69-71. What is the difference? Anyone know?

 

[oldkimmer]

The fittings may be clocked differently. Kim