Hope you do well with them Rod. There are a lot of heads out there in that segment.
I have looked at those Hughes bigmouth eddies before. 225 intake ports and they( according to Hughes) go over 300 at 1/2 inch and are Eddie castings.
Not trying to pick on you, sure you know what is out there... Lol
71 Duster with 318 magnum. Pumpgas, iron heads, hydraulic cam, 3415 race weight, flat hood, full bench interior, all steel, stock 5/16 gas line. Monster driver aboard. 11.66 @ 114.04 so far.