they did a set of edelbrock heads for me a while back(3years)also the specs and parts for the rest of the motor. I would highly recommend them. check the web site, no bull-just bad ace ponchos(i think thats what he says). bruce knows his stuff. just remember speed cost $, so talk it out up front, he spent several phone calls making sure he knew what i wanted and what was the most cost effective way to do it.