Center drag link, are they really $600? 1964 dart
First thing I would do would be to install the engine/trans and check the clearance. Chances are you won't need to change anything. My first '65 Valiant (170, 3 spd.) my Dad put a 340 into back in late '69 and the 2nd '65 (225, auto) I put together in the mid-70s cleared just fine. As far as shimming the motor mounts, I did that on the 2nd one for clearance on the fenderwell headers I ran. Used a couple large fender washers between the stud & frame and never had a problem. Another area that some folks have clearance trouble with is the seam in the tunnel. There again, no problem on either of mine.
YMMV, though.
