Opinions on 4 speed with OD

That would have been excellent in the first post because the more information available there is the quicker you can get an answer. Just saying, not bashing.
Different size wheel wells on different cars create different outcomes.

An example is a Duster which can take a 28” tire and if anyone wanted to go to a 30 inch, there is a little metal work to be done in front of the tire. Some consider that a big deal in ether work load or they don’t want to ruin the car in that fashion.

100% Agree. More info is always better than less.
Since different cars can take different tire sizes, and different cams/builds can change the target cruising RPM, this thread is a lot of shooting in the dark.. lots of members have contributed a ton of useful info, but since OP omitted so much it's not as constructive as it could be.