What is the bias of Forte 1a?

I have a Forte Audio 1a power amp and I am going to upgrade it and find out what is can truly do but I need to know what the bias setting is supposed to be? I cannot find any information on it or a service manual. Thanks for your time and help.
I believe the 1a was purported to be pure class A, but I have some doubts about that claim. You might want to contact Threshold or post this question on diyaudio.com. I don't believe this was a Nelson Pass design, but he generously offers advise quite often there. Others there may have already traveld the same path as well.
Get ahold of Jon Soderbreg at Vintage Amp. He worked there when they were built.