[GB SISSON]

I have a lot of springs here. My gut feeling is to test and use these tried and true US made Ford springs. To know the 'installed length' do I have to install them or is there a generaly agreed upon dimension used for this purpose? I understand that a valve set up with it's spring and all keepers installed as a unit will change once it is installed in the block with it's horseshoe clip. As I stated previously, I have a lot of questions. Here's one more.... What would seem to be more accurate in testing valve spring pressure? A clutch master cylinder with a pressure gauge threaded in, or a digital bathroom scale? Either would be set on my drill press with the depth stop set at installed spring number.And Tubman, that's neat job on that compressor.