I'm in the process of bringing a dead horse back from the grave. In this case it's a 91 S-Blazer with a busted crank. I'm about to pull a running 4.3 from another Blazer and do a transplant. While it's on the stand I'll be doing front and rear seals and checking the timing chain. I'm getting a very real craving to try for a little more low end from that 4.3, as it will be towing a lot of the time and getting saddled with a plow this winter. I've run Edelbrock Performer cams in big blocks before, and the Performer manifold on a small block, they seem to work as claimed in those applications. Now I want to put the set on the 4.3, cam and manifold together. Has anybody used them? If so, are they worth the money?