These 14cc assemblies come complete as shown with rockers, valves, springs etc minus the lash cap. You could use your own clone/hemi lash cap or purchase one from our site (stock lash cap). They are 25/27mm and the springs are what we would call stock, I would recommend upgrading them to something like our 10.8 racing springs, etc.

Yes, we do have custom options for this head available but on these complete assemblies I would not recommend more than a spring upgrade and or porting. For other options I'd recommend starting with our bare casting options

Please allow up to 2 weeks to ship as these are made to order