It'* done! Dave just called! It'* all back in & running!
I was talking to Paul from PRJ, and he told me that for my build he would recommend a single chain. So I called Dave at 3EP, left him a voicemail message asking if it'* reasonable to swap out chains months after a rebuild, and he called back saying that as he was about to put together the transmission, he got my voicemail; also, he had a chain right there in his shop. I decided to opt for the 7/8" single chain.
I have everything on Dave'* list of the high performance build plus a hardened input shaft and a single 7/8" chain.
I'm going on Tuesday to pick it up!