318 For Fun

Well, at least you got it right with the cam!
Howards Cams, Hydraulic Flat Tappet Camshaft, Chrysler SB 273-360/318, 208/214 @ .050, .479/.494, 110 LS - Competition Products
I would probably order one while the ordering is good. Last time I checked, cam cores weren't exactly raining out of the sky. I would probably go with some 234 closed chamber heads and install 11/32 stem 1.94/1.60 chevy valves with a good three or four angle valve job. Use KB167 pistons and these head gaskets.
NOS Chrysler Dodge mopar head gasket set PN 2806984 318 360 60's 70's | eBay
I probably wouldn't put in a converter looser than 2200 rpm.