Head decision time

the reason that I asked the question to start with was the 273 heads are closed chamber. I have never used this head on a build before and wanted to see what the consensus was v.s. the 360 head.

I have run a 1974 318, stock piston, stock bore with a set of 360 heads with a .484. 284 MP cam shaft before. With Headers and a 650 DP ran pretty good, went 13.30 in a duster with 4:10 gear. I could shift it at 6500 all day and it ran really strong on the high end.


I have a selection of heads ready to use. They are all on the shelf.

Heads:
273, closed chamber
318, stock configuration
360, 1.88 valves

Intakes:
Eddy SP2P
Stock Cast 360 Intake
M1 Single Plane


Was just looking to see what the benefits or draw back would be with that combination. I am looking for something to run in the mid 14 second range.