valve spring height question

today i went to my local speedshop to see what they had in stock. they had a set of Crane 7° retainers. so the owner of the shop let me take one home and install it with my 911 springs to see if it increased my installed height. just looking at the retainer it looked like it would. I installed it with my stock locks and it increased my height by .100". so in tossed on the rocker assembly (stock) and due to the increased height it locks like it comes pretty close to tge rocker arm. another question is are the stock 7° locks the same dimension as the Crane or Comp 7° locks? because my stock locks sink into the crane retainer. buti guess thats how they give the added hieght.