Carter BBD High Altitude Jetting

Well changing the MJs only affects the 'Main circuit". It has nothing whatsoever to do with the low-speed or idle circuits. So, If you never floor it, then, there will be little to no change in the operating characteristics, with an MJ swap.
And depending on the year of the carb,it might already be on the lean side.
And depending on the engine's current specs,or how far it is from the factory tune, the carb may already be perfect.
And yes, temperature does play a big roll in power delivery. That info was enough impetus for me to cut a big ol' hole in my hood and deliver fresh non-superheated underhood air, into my carb. Of course,now, I am at the mercy of barometric pressure and humidity,lol