In need of some 273 head education

hi, the 273 head will provide enough flow.the casting # is last 3 numbers, 178, 234,920, these are the closed chamber head. used on 1966 -1967 273/318 motors. as for a cam, the isky E 4 grind works very well in the 273 motor. numbers are, 260 dur, 216 @.050, .425 lift, 108 LCA. it is a very streetable cam and works in a race motor also. installing larger valves doesn't help, because of small bores. how ever using a good nail head sst. intake valve will help flow.ferrea makes a valve for that head. a dual plane intake is best bet. the 10.5 piston is made by C. P. pistons, J.E. pistons.
in 1966, dodge brought out a 275 hp/273, only difference was, bigger cam, holley carb, racer brown springs, 4.86 gears, headers.