I have to do a reset. Sorry for leading everyone down a dead-end path. After taking it all in, it didn't sit right with me that a head that was built specifically for hyd roller cams could have spring pressures so far removed from Hughes Engines' specs. Today I spoke with Jeff at TF and got the right answers. I was referencing the wrong spring p/n. In my defense, I was using the p/n that was at the top of the list of spring options that were included in the instructions. Turns out I was referencing a hyd FT spring. Never assume, always go straight to the source. For those who may be interested, the correct p/n is 16094-16.