Finally the decision has been made.

Ok so here Is the update on the head measurements I promised.
I measured them in a couple different ways just to make sure I covered it all here is what I got.
The installed height of the spring is 1.64
The max lift height (retainer made contact with the seal) is .490
The max lift without the seal(retainer made contact with the guide) is .615
And the retainer to spring seat when open is 1.16 with the seal and 1.03 without the seal. So doing the math with the seal in place.
1.64-1.16=.480 my book recommends a .100 clearance so my max lift would be .380
That clearance seems a little much to me but that's what is says.