25 years ago, when I was did many pairs of SBF heads, the ports would always come out looking like a "D" shape. This porting job was good for about 40 HP with the 1.54 valves. On this set of 69 quencher chamber heads, (stock with 1.84 and 1.54) I also had 1.94 intakes installed.

The lower right hand side of the exhaust port, there is a water jacket for the spark plug. Watch out for it.

Hard to see in this photo, make sure you de-sroud the intake valve, on the chamber side, that will help a lot too. These heads pushed my 4000 pound Torino to a 13.5 second 1/4 when on my 351W.

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What is life worth, if everything comes easy...?
66 Stang 385+ HP 306 .494 /.520 225 durr @.05, 200cc Windsor Sr's, Edle RPM, C4, 3.00 posi, 575 Annular Mighty Demon, 22 MPG,