Thanks for the pics, they are worth a thousand words.
My old CB750 guru had pegs on the swingarm forward of the axle, he had 400F handlebars and a fibermold gas tank and the seat that I have on the Rat Race. He launched and then stretched out and shifted with his left hand. I have that bike and hope to ride it one day.
The engine was an issue, I thought I had bought two 72mm stroker pistons for it, but they were both for even cylinders and I need an odd one. The cylinder was scored and it had two dropped sleeves.
The Webers were gone, the tank was gone, I replaced both of those, A guy gave me the header a few years ago. It was in Tom's bike shop, and it was nit picked apart, also missing the rear pegs, small hardware, headlight and other things he could sell.