IIRC you could cap the heat stove on the Offy and run a water inlet to the manifolds PCV port (or whatever that little screw is on the side) , but you'd have to plumb a return off the bottom of the stove cap, easy enough to redirect it as the new extended bypass from head to pump. View attachment 1715594178
That is the exact set up that I have on the slant in the 83 D150 with dual Dutra’s. I changed the egr cavity in the stock cast aluminum two bbl intake into a hot water hot spot.
