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

My first head porting(360 with the air port bump in the exhaust.

As RRR said i ported the **** out of the intake and exh port. would run 7200 rpm with my 340........but would not pass the old sniffer test.
Stock set of X heads with a port clean up, and the old I/M tester was happy...........same cam, same compression, same intake,............ran out of breath at 5800 RPM. but they past the emission test so i could licence my car.