318 block, bore .030 over with MP 360 heads with the 2.02 intake valves. Head were milled .030 and touch up by Muscle Motors here in Michigan. MM told me they believe the 308 heads--late 1980's 360 heads are the best factory head..besides those W2 heads.
Sure some old 360 heads would be good too.
That intake does have small runners but it sealed up good to those 360 heads