Cam Operating Range & Highway Driveability

2.76 rear gears?
That is an odd combo... What is your intended purpose ? Bonneville ?

I currently have 273 gears and the 42RH overdrive with a mild cam designed for 3,500-5,500.
Bonneville was back there a few off ramps.:D

I am finally about to start on my 8.25 locker with 355 gears though, which has always been the plan.