Need advice on frame connectors

You want the least amount of stuff on the car as possible. Ideal would be a bare chassis. The engine and rear are heavy and will cause the body to twist if not supported correctly. I support the car on the frame right in front of the t-bar mount and at the front spring perch in the rear. Level it up and weld them in. If your rear is still in i would support that to, just enough to take the weight off the chassis.