Rear gear Ratio Opinions/Suggestions

[custom10nut]

Just throwing this out there for the masses.
My C-10 (350/TH350) currently has the factory 3.73 rear gear.
My goal is to get better drivability on the Highway (65-75mph).
I know mpg is a pipe dream.
Currently it’ll run around 32-3300 rpm around 70mph.
It’s ok for shorter trips, but currently, longer trips are kinda out of the question.
What I’d like ist to get the rpm down around 25-2800 range.
I don’t tow anything, and other than occasionally running to the Lumber yard, it’s really in semi-retirement (like me)
I’m not ready to “upgrade” to a 700r or 4l60,
Would a ratio in the 3.23- 3.35 range help any?
I just wanted to ask