The heads I have are not the same as the RPM's. I wish they were Id send them in for porting. They are the "311" head. from mopar or the 383/440 aluminum head. they are several years old. The CNC port from Modern on the RPM/ Stealth head looks pretty good for an engine like mine. I have AndyF's book and he seemed to have great results with them.

I dont think my heads are "bad" it would just be alot easier and less down time if I had another set and swapped them out, I can either sell my 311 heads or save them for another build. If I spent 2-2500 on heads and resold mine for 1K I would only have 1-1500 in my head swap. not to bad.