40Ford, Thanks for the info. I was curious with the valve weights and lift what kind of life you were getting. We spin our 99 a little less RPM but with more lift and obviously much heavier valves. I also use Pac springs and we never leave the rockers on the car. We just switched to a heavier spring and so far seem to have better valve spring life, I am sure soon we will find the limits of them however.

I to am contemplating building one fo these engines. I just cannot seem to find the good guy deals like some I have heard of on the hard parts. Not worried about consumables as we will replace most of those anywya in building an engine.