I had the same problem two years ago when I bought my tank from ERA. When I mounted it, and it interfered with the MSD distributor, I asked Doug what to do about the problem. He just said he puts a pry bar between the tank and the block and gently 'tweaks' it away until he gets the required clearance. I did just that and although it's close, I've had no problems since.
Although the photo isn't a close up, it shows the relative 'tight squeeze' of the tank and distributor. I'm able to adjust the timing without any problems.
