Can someone confirm that all W5s are 59 degree heads (unlike W2s which have 48 and 59 degree versions)? I am 99% sure but need to be 100%. I have been searching for a confirmation on-line and in a few reference books but haven't come across that info yet.
Also, there was a MP dual plane manifold made for the W5s but I cannot figure out what application it would be for. Has anyone heard of this manifold and what its intended use was? I don't have any of my older parts catalogs any longer.
TIA