I have three sets 2 596 castings and one set of 915 j heads i am considering getting some speedmasters for my next build my current 360 has a set of worked 596s im happy with them so far.
I'm actually very happy with my 596 heads and paid more than a set of speedmasters to have them rebuilt..(before I knew better) but they're goin on a truck where weight isn't as large of a factor..
