You can still buy Russ’s “torque grind” camshaft from his website. I think his family is keeping the business going. Here’s the link:
russrepair.com
R&D sells an upgraded cam as well, but I think it’s meant for turbo engines.
As for MPG expectations, my NA 91 F250 4x4 with 4.10s and 35s got 17.2 MPG on the last tank (almost all highway). This is with a GPS speedometer so no error due to oversize tires. I have a healthy engine and recent top end rebuild, but I think a big thing is making sure your brakes aren’t dragging. The pre-95 front brake setup can really cause the brakes to drag if you dont pay attention to it.
