Summit cylinder heads

[28buick]

I have been considering new cylinder heads for my blazer for some time. I see that summit racing is now carrying their own line of cylinder heads. Does anyone know who makes them or if there are any problems with them. I wanted to go with a set of Vortec but these heads seem like they will work for overall less money. The truck is a 72 blazer with 4 speed and a 3.07 rear. The motor is a basic Goodwrench crate with about 10k for milage. The truck is used 90% of the time for towing.