I did them on my 70 Parisienne, it was pretty straight forward. I got a kit from Impala Bob's, but they just provided regular bolts, so I cleaned up my old bolts and put them in. Not sure what modification you'd need to do, there's just a hole in the bracket, and another hole in the frame horn.
I should have the Impala Bob's box in the garage, I'll see if I can dig it up for the part #.
I bought both the body mounts & rad support mounts from them. There were enough body mounts to do a couple cars, but I think only 1 set of rad support mounts.
I suppose they could be thought of as being kind of universal. It's that distance between the rad support brace and frame that needs to be kept in spec. Too thick and the fenders will want to push up at the front (although they are totally crushed now). Then the diameter needs to such that it will pass through the frame and the support, mating together.
I should pull one out and see what it actually consists of.
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65 Laurentian post, 67 Grande Parisienne 4 door HT.