318 cylinder head choices

stock 318 open chamber heads are around 68cc's, the bone stock 675's I have a t least.

the heads choice between 360-318 port window will either have you building it radical street/strip or mild street/strip.

If you have '170 psi' cylinder pressure, 2500 stall and 3.55 plus gears, I would do the as cast 360 heads with 5 angle vj and small 11/32 stem 1.94/1.60 valves and only port/polish the exhaust [in this case].

And use a cam with 58*-60* over lap for around 9.7 comp

jmo