how to lower Kmember/engine

'66 dart 360/904 stock car with aftermarket thin shaft steering column. Is there any way to lower the engine and or kmember to get my driveline angle right. I have raised the engine a bit & slotted the bolt holes/lowered the steering box so the magnum ex manifold on the dr side would clear the steering box but I am anticipating driveline angle problems. thank you for your time. RR