Quote Originally Posted by glennsexton View Post
270H Magnum™ . The 270H has a rough idle in small blocks and a noticeable idle in big blocks. This is the largest cam you can use with a stock torque converter. The 270H will not affect power accessories, but should be used with headers and a 4 BBL. carburetor. This is the perfect cam for cruising.[/I]”
If it can be used with a stock converter then this cam should idle in gear fine, and I think they are talking the performance aspect of when power turns on, not if it will idle. I think you have other issues, fuel, spark or vacuum. Check for Vacuum leaks, and ensure your PCV valve is working. Dead miss on one cylinder is mechanical or ignition, find dead cylinder and do compression test to see if cylinder is OK. I wouldn't blame the heads up front until everything else is checked out. Heads may not be optimum for combo, but people have been overcamming smog heads for years and the cars still run, there just dogs.