Posted by Gary DeMoss on Tuesday, July 02, 2002 at 10:54PM :
In Reply to: P 14 or P 15 motors in early 1/2 ton WC's?? posted by Eric B. on Tuesday, July 02, 2002 at 10:58AM :
If you look on the engine block just below and to the side of the distributor there is a casting number on most.IT has the month,day and year the block was cast.If it is before the delivery date of the truck it's most likely the one that it came with.