Edelbrock goodies, do I put them on?

[65ChevyC20]

Hey guys, I have been a member for awhile, always lurked but seldom posted. I have a truck ( see my screen name) with a 327 and the manual trans, Sm465. I was recently given an Edelbrock Performance manifold,a 650 cfm carb, cam and a set of ceramic headers for my engine. It currently has the stock 2 bbl carb on it and seems to have plenty of pick up with this setup. My question is, would I notice any performance gains by adding this to my truck. I know at freeway speeds the engine is turning higher rpms than I would like, by adding the four bbl would I just be wasting fuel??

I was planning on swapping the SM 465 for a 700R4 to gain the overdrive, should I just wait to bolt these performance goodies on after the new trans goes in??