[updated:LAST EDITED ON 23-Jan-02 AT 12:50 PM (EST)]Nitro,

351C 2V engines were factory rated at 163-177hp (using SAE net "real" numbers) with 9.3-9.45:1 compression, stock exhaust systems, and stock Autolite 2100 2V carbs.

I'd concur with xyfalcon500 and guess that you should get close to 300hp with all the mods you're listing, especially the higher compression, camshaft, 4V carb, and headers.