Magnum Exhaust Manifolds in an A Body

I test fitted my driver side manifold with Flaming River manual gearbox to power steering coupler and there's still some interference. Not a lot but still some. One area is where the transmission gear select lever arm is (column shift) I've since cut that section of the gear shift tube off (not pictured) another area is the manual gearbox just contacts the bottom of the manifold. Very little grinding to the manifold should fix this. And last the allen set screws on the coupler. One of the screws clears fine and the other hits the bottom of the manifold. I'm going to drill an indent in the shaft to sink the screw into this should take up the amount required to clear the manifold when the steering wheel is turned.