Turning torque for engine

I’m willing to pay someone to diagnose and fix this issue . I will travel for the right person. I have had it at a couple of shops around here. They’re really not into old-school stuff especially stuff that has been modified.
I'd be happy to look at it. I'm pretty confident I could find the issue. You've been on my property before and you know how secluded it is so no one would mess with it. My only problem is, although I do have a shop, I don't have room for the car inside.