Late 80's swirl port heads 302/714's

There is no swirl in 302/"714"heads, never heard of those heads included in the bs swirl gimmick.
The 360 heads, those are all swirl, the wall hump ...that was swirl enhancer. 308 is a swirl head there is no difference between that int port and any other '360' production head beside maybe port volume, which varies 5 cc or so.. The 894 x is not a swirl head. The shape isn't there. No one has to agree with what I'm saying, it is what it is.

OP the only hp gain was from the fast burn chamber that also raised the compression..being that they came 64cc and the 675 head was right at 68cc....they flow the same with the 302 head a hair, literally, less... like 3 or 4 cfm LESS than a cherry stock 675 head.