Llama Man,
Rick has given you a good option. However, here's quicker and better one. Make your motor mounts solid. If you have rubber mounts, you can probably just weld a piece of steel strap on either side. (Do it outside so the smoke won't choke you.
) If the bell housing is just touching and the mounts are solid, you'll be fine. Your transmission mount cannot be solid. If you can find one, install a polyurethane tranny mount (instead of rubber) that will be better. It will move some and the bell housing will "self-clearance". Get that Cobra on the road!
There are multiple benefits with this approach.
1. Your headers and side pipes will not be constantly breaking due to side to side rocking. I learned this from Ron Butler after years of fighting this problem.
2. You will not need a ground strap (weight and cost savings).
3. You will have instant acceleration when you let out the clutch.
4. You feel everything the engine is doing, like when a plug wire falls off.
5. If the engine is built well, you will not feel vibration unless something is wrong.
RallySnake