I have the 187 pan and pick up mentioned above, if you need it. also you can put 3/8" or 1/2" shims between the k frame and frame rails, will give you that amount of clearance. the factory did it on the 68 hemi superstock drag cars!-----bob
3/4 nuts work perfectly for that, and look nice. This lowers steering suspension in reference to the engine mounts that are hard on the frame rails. Applies a slight torsion bar load though.