Help! Doug's headers in 67 barracuda

On my 68 318 barracuda with the stock k member I had kind of the same issues. I switched to truck motor mounts which are a little taller. The taller mounts cured my issues. But I had the biscut mounts.Maybe the spool truck mounts are a little taller as well??
Im putting Doug 453s in my 68 Barracuda. 340, 4spd, factory power steering box, stock k frame. Steering column out. No t bar issues. Left side installs fine with p/s box out, no room to reinstall p/s box and vice versa. Anyone solve this issue using the Borgeson box alone? Reading through the thread I will raise the car further, and start raising the engine/ possibly truck mounts.