I found the old article
220 LA head flowed 320
Offered in CNC form only in alum
That must be the baddest smallblock head ever divised not running off-set rockers etc !
I’ve gotten 318 on my bench without moving the pushrod. His was out of a set of ProComp, Speedmaster heads which he claims filled the bottom of the port removing the danger of hitting water. He claims Edelbrock wouldn’t do it. My heads were under the 220 cc intake port size and done by hand. 50 cc is a lot of material to take out of a port any other way than by cnc porting.my ports were so touchy every single port was on my flowbench multiple times to get them calmed down. A buddy of mine is building a customer engine with a set of Doctor J heads and he also has a new set of TrickFlow heads he bought for his sons car. He wants to bring both sets over to do some testing on my bench. If I ever get to feeling better that sounds like a fun day.