Classic will sell you the underhood part only. Another good supplier for underhood AC stuff is Bouchillon performance. On my '70 Classic Auto Air rebuilt the OE in car part and I used a combination of Classic and Bouchillon under the hood. I liked the lines from Classic better (more fitted metal, less rubber) and the compressor mount from Bouchillon. It all worked fine but if I do it again, I'll stick with one vendor for simplicity. Both are good in my book.