Before I answer the first 5 questions that you asked, can I ask you one question? Have you run a shaft setup with this tall of a spring set-up on a 23 deg. small block chevy head? I'm just trying to find out if anyone has. There is no intended use, it's used, shift at 8,600 rpm thru the traps at 8,800.
Height is 2.250" to top of retainer and 2.350" to top of the lash cap. Sorry for being obnoxious, I'm just a slow typer and it would take me 20 minutes to explain all the specs.