ALUMINUM S.B. PROMAXX HEADS ANY ONE USED THEM ?

very glad to see the info on these heads . I have been looking at them for a year now but only found info from promaxx . A little later on i saw in one of the Mopar mags or engine Builder mag were they were talking about how good there were wright out off the box but can't remember were it was that i saw it . Thanks you for the info on the other post .