The cam recommended by Lunati is fine for what you're wanting. As to sound - go to this site and listen to the car. 1983 Z28 Camaro 355 Vortec heads Lunati cam 60102 Upgrade - YouTube

Anything more "lopey" will in all likelihood be an indicator that you've over cammed the engine and as has been mentioned above tag you as a poser to those who understand what a lope really means. When I hear an exaggerated lope on a street I just smile and know that the car runs like a dog and the owner is pouring money down the drain. Fastest street cat I ever had (11.75 at 115 in a 1969 Chevelle with+/- 425 horsepower and about 3500 pounds w/driver)) idled smooth as silk and pulled like a wombat to 6200 RPM. My new Mustang GT weighs a couple hundred pounds more and has an advertised 420 horsepower and runs low 12's (as per reviews - I've not run the car). it has a nice rumble but no lope at all.

Let us know what you decide - Welcome to CHR!
Glenn