1st off, with Vortec heads you'll need new valvesprings to go that high on lift. They are only good for .470 stock. Your rear gear is good, compression is OK (10:1 would be better) but don't forget the looser converter.
My nephews combo was a 355 Chevy, 882 GM heads (not great) 10:1 compression, Summit .488/.510 234-244* cam, RPM dual-plane, Holley 650 carb.
It was in an '86 442 with stock 200-4r trans with a 2,800 stall & stock 8.5 rear w/ 3.73
It ran pretty good, but really pulled hard after 4,000 RPMS. But by 5,000 the stock heads were outa air. Idle sounded killer for a street car, but it had more bark than bite. His heads were what was holding the combo back from making serious power.
So, I hope you see what I'm saying about that size of cam. It might sound nasty, but if you don't have the matched parts to support its needs, you're dead in the water.
Vortecs flow pretty well, but if your budget allows I'd look for some DART Iron Eagles, Patriot, World, or for the best..... AFR.
It isn't all about "how streetable" the car may be, it's about how & where the engine makes its power. The cam you're looking at isn't big by racing standards, but it's plenty big for a street driven car. The lift isn't crazy, but the duration is plenty high. That's why you need good heads, high stall, gears, & compression. It will want to rev & have very little low-end torque.
