Gold Lifetime Member
Join Date: Jan 2000
Location: Wilton, Ca. USA
I can only speak of a 69 and there are differences between the 67 frame and engine mounts and the 69's, but.......... on the 69's almost all the reproduction frame mounts are wrong. On the 69 the engine is offset towards the passenger side and the drivers frame mount is taller to gain clearance for the exhaust/power steering box. I do not know that they did this on the 67 though; I had heard the 67-68 were different than the 69's.
However, it at least sounds like the mounts or frame pads are too tall as I have the GM Performance bb cast covers which are TALL. They clear roller rockers AND a stud girdle with those very long adjustment nuts. It's STILL lower than the wiper motor, with 1/2-3/4" clearance between the motor and the covers. I do have to remove the wiper motor to remove the driver's side valve cover, but it can easily be re-installed after the cover is back on. It sounds like the engine is too high. I'd double-check the frame and motor mounts. On the 69's there are more incorrect than correct ones and everyone has header problems because of this. By the way, the guys who sell them say they're correct but they are definitely different than the originals which the Hooker headers are made to clear with.
Maybe someone here with a big block 67-68 can get you some heights on the frame and motor mounts to compare to yours.