Ok, that will be good.
The 2 blocks are really the same block. It's just that some blocks have a brass resitrictor pressed into one particular orfice, and the other metering blocks have the restrictor pressed into a different orfice. The both orfices exist in both metering blocks - it's an easy thing to miss.
I'll troll the net and see if I can find a picture for you since no one else posted one.
Jim
EDIT: Found a pic and illustrated the IFRs...
Last edited by JimG; 09/03/09 05:23 PM.