I really think I can build my own head identical (or close) to a early twin reverb. Can someone point me in a direction? Maybe some people who built their own? Haven't found any really useable forums. I found a source for lots of the items needed but would love to hear about other peoples attempts.
I see no reason to do that. It would take forever.
Way better to either:
Buy a twin reverb off of this board, Ebay or CL, there are many many for sale right now across the country. One on this board with the JBL D120s!
Go the Sarno SMS pre -"amp of your choice route" maybe a Mesa 50/50, a Mac or other power amp.
It would be way cheaper and faster to buy a twin, modify the head to black face, or Jerry like preamp tap and continue on from there.