Trick Flow small block heads

Just curious if this was in recent years and if they had the swirl/wing design?, also if they did if you get rid of it. Interesting since the ones I have been around have been excellent out of the box and a couple were tested on different benches. The main thing is out of all the sets I've seen only a few were flow tested but all the ones at the track ran the numbers they should for the power. Chevys being like rabbits their are no shortage of afr heads around here lol.


time fly's but I going to say around 5 years ago, maybe 6. It did have the wing in it and I did remove some of it but once again my major porting work it making more area at the short-side. I check air speeds and address an area to control it then move to another area. As soon as I pick up more CFM there I may have to move back to the short-side. You can see and hear turbulance if you know what you are looking for. I continue this till I see the numbers I want at the lift I need it at. .750 lift numbers although are important mid lift numbers are the main objective especially if only using a .625 gross lift cam.