Alex ,
Check out edelbrocks web site they sell crate engines with very similar spec to your engine and you can compare. My guess is 375hp to 400hp at the flywheel. Edelbrock has a 363 hp crate that has a slightly smaller hyd roller cam and 1 point less compression than yours. The cam you selected is pretty mild, should give good vacuum and street manners, will also have a little rumpity rump.
Rich