I have always heard good things about Rick and CHP. I wouldn't even think about DSS. My DSS Pro-Bullet 331 exploded during normal driving. Just my experience though. My engine had under 7,000 miles on it when it blew. I would stick with Rick or CHP.
I secound Rick 91gt too. He is building a motor for me right now. It's a Dart blocked big bore 364 w/ AFr 205. Zero balanced, 11.3:1 , custom Jay allen cam, JE pistons ARP bolts. Complete intake to pan His prices are less then i could have got the stuff my self.