Highway Revs

[72Thunder]

Hey all quick question,

I will be getting a very well built 350 that will produce quite a bit of power (estimating 300-350 hp and 350-380 ft lbs torque). I have 4.10 rear gears and a turbo 350 transmission. Also on my set up is that my tires are 30" in diameter. I feel like i will be doing very high revs on the highway, (calculated 2700-3500 on various sites) so i want to get away from the 3 speed and go for something that will theoretically give me a little bit better revs on the highway. What is the most recommended transmission that I buy? I am thinking a 700R4 but I've heard otherwise. Basically, I dont want to wreck my engine by sitting at higher revs for extended periods of time.

Thanks in advance!