318 MAX fuel economy builds?

Are you ditching the roller cam in the 5.9 then to run the Rhoads? I see they make roller lifters for ford but I have not seen any Mopar roller Rhoads.
That is the thought process. But this build is on hold until the car is up and running again. I have to do an exhaust.

Rhoades does have MoPar roller lifters. Click below and scroll down to the second to last on the left for V8 applications, all the way down on the right is a listing for the 239-6 cylinder as well. The listing stops at the year 2000.

Maybe I’ll find a roller cam that meets my spec? IDK?
Product Listing - V-Max_Flat_Tappets