Jim,
The "Be Cool" Cap is just that. It just pops over a regular radiatior cap. We use 17lb caps at the most. Usually 13/14. Our systems always bleed a little but a small prive to pay to save that pain in the arse core!
Stop in an take a look at the new heater system. I think you will like it!
DV- PS how in the heck did this turn up in the ARIZONA THREAD?