I doubt it. If EB3.5 buyers are like my engineering friends, they bought the ecoboost for the torque. A 5.8 would be similar to the 5.0 coyote in terms of output so no significant change in the buyers. The 3.5 EB and power boost are in a different league when it comes to torque....410 vs 500 and 570.
Ram attracted buyers with the interior, particularly the large screen. The ‘21 f150 closed that gap.
GM has the 6.2, which is the most powerful non-specialty 1/2 ton v8 (lots of disclaimers there). The power boost edges it out in hp and easily beats it in torque and fuel economy while delivering the nifty 7.2kw pro power feature.
A 6.8L or 7.3L Godzilla would bring in some customers. But that would be because of it being more powerful than the competitor’s v8s, not the pushrods.