I sure someone will post the specifcs, or it can be found in a few issues back, but as I understand it the FS19519 is the same high performance filter Required on the ISB but not required for the older B's. Higher micron filtration, larger filter canister. It is a direct screw on filter other then the tight fit for 94 - 96 trucks.
Not sure what would all be involved to go to the newer canisters.
Like I said, I think one could run this filter longer then the standard filter which is probably changed far to much already. For the few times it has to be changed it is not that big a deal.
jjw
ND