Big mouth heads

Has anyone used these heads or flowed them to see if they are the real deal.

Go over to FABO... there were one or two builds with them. Results were mixed IIRC.

I am on Fabo. Wanted to see if anyone here had used them or knew anything about them.

All I can add is add is what I found. On my best set of Edelbrock heads I porteded I tubed the pushrod holes and took every bit of available area and they flow slightly over 315cfm. The air speed at the pinch was in the range I like to see. I matched a port on a new set of heads and then I put aluminum round rod in the hole and had Harlan Sharp make me a set of rockers .350 offset so I can open the pinch even more. Now this port was already flowing 315 cfm and when I opened up the pinch .200 more I gained nothing. There are other things I want to try in the port but I kinda lost interest in that project. Hopefully this winter I will drag it out again

I had a set of the next version down from that here for freshening a couple years ago.
The ones that are shown on the Hughes site as flowing something like 313.

They didn’t flow that on my bench, and they didn’t sound that good on the bench either.

No experience with the actual “big mouth” though.