Ron,
Twisted Wedge heads are manufactured by Trick Flow for Windsors, SBC, they are not side canted like Cleveland heads, but the valves are not in line either. The heads are pretty good out of the box, and better with porting. The AFR heads, which use plain old in line valve geometry, normally beat them in head to head testing. So is the twisted wedge really any big advantage? I would buy AFR heads with my money. Or FRPP heads.
To the best of my knowledge quality control with the twisted wedge heads is spotty. Spotty quality control with aluminum parts raises a big red flag with me, because if they cheap out on the finish work, they probably cheap out on the choice of alloy and on the heat treating too.
I would love to see that list of parts when you get it, you know where I'm at!
your friend on the DTBB, George