10 second car is obtainable with cast iron heads but the problem is even stock cast iron heads once rebuilt are going to be more pricey than a set of speedmasters on Black Friday...
I'm using a set of freshened 360 heads on my next build but if I didn't have those leftover from my duster I just buy some speedmasters..
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.
