I don't see any info, are these magnum heads? the pic shows the magnim bolt pattern, and what's the dif on the hydr-r and the hydr-ft, and what's the deal on the free intake?
the Magnum bolt pattern or I should say angle is on the intake manifold but it has both ways.. they are La heads.. you can see the hydraulic roller is a little bit more expensive because the roller lifters are heavier and needs stronger Springs..