heads... exhaust... intake

ok well im here for help as usual.... im just wondering what the advantages and disadvantages of putting 360 heads , exhaust manifolds and intcke manifold on a 318 are... can i get better performance out of the 360 heads on my 318.... i know i can get just as good flow and better ground clearance out of the 360 exhaust manifolds and he says i can get just as much performance out of the heads as i can with doing alot of work to some 318 heads... if you guys could just help me out here it would be much appreciated... the 318 is standard bore.. has had no work on the block... has a mild cam running a holley 650 and thats about it right now... please just let me know about this its much appreciated

BTW i have read alot of posts on here about why the 318 and not the 340 or 360.... please don't start that crap on my post... i have my 318 because i don't want to be like everyone else... and thats all there is to it... im just trying to pull as much out of my teen as i can

Toby