whereas a new filter head, for an LLY because they don't offer one for an LB7 any longer (and when it was available, the LB7 part was much more expensive), is $199.95
Nah, not anymore. They're available from a variety of mfrs and at a reasonable price comparable to the later version.
I don't think the LLY-LMM filter heads were ever $200. Last one I bought several years ago, was on a Saturday and from the Dealer parts counter...$125.
And that's for a full assembly; the head, new filter, new heater, new WIF sensor...not just the filter head alone. Just the head now, can be found for $75-ish.
The only difference between the two head designs is the angle of one of the tubes, which the newer design can be adapted to fit on the LB7 by replacing the fuel lines with 1/2" bulk fuel line.
Which should be replaced anyway, when the filter head ages enough to start leaking prime, and could also be the leak source from those two lines and not the seals in the filter head.
(Note; not all seals are serviceable in the filter head with the rebuild kit....there's a possibility that after a rebuild, it'll still leak. But many times it is one of the 6 seals in the kit that is leaking.
Roll the dice.
As old as it is, it's unlikely that it still has the original head on it anyway....but it's possible.
Parker-Racor made those old original filter heads and you can still buy 'em today, from various sources.
Pics in this link, difference between the two seen. https://www.parker.com/Literature/Ra...F4245R2-04.pdf
2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite Air...EFI'd by Rob
2008 LMM 3500WT DRW Crew Cab, 8 'Flat/GN, Workforce Alum Toolbox, Ride-Rite Air Use-ta Haves 2006-6.0 3500 WT DRW ExCab Flatbed, 2005-LLY 3500 LS DRW Crew Cab, 2002-LB7 3500 LS DRW Crew Cab I Live my life in such a way that when my feet hit the floor in the morning...Satan shudders & says "Oh shit, he's awake!"