How low are 355 gears

Hi everybody.

I'm wondering what gear set to buy, 323s or 355s They would be matched up to a 904 with a 340. I want to go 60 mph without screaming down the hyw but it would be nice to really get up to 60 mph fast. How many rpms would my motor be turning over with 355s at 60 mph? 2500-3000?

Tire size and converter stall will be in the equation also.