I've checked the lift numbers with the triple valve springs and there doesn't seem to be much lift lost in comparison to a checking spring. The Jesel's appear to be right on the 1.70 ratio.

Here is a picture of the final configuration of parts that I ended up with. Manley locks and Manley retainers did the trick. I ended up with 2.005 installed height and plenty of clearance for the rocker arms. I had to work my way thru a few hundred dollars worth of parts to find this combination but I guess that is good for the economy!