273 motor mounts --- source?

I recall getting the wrong ones (thin) first time I ordered, maybe from rock or Autozone. I installed them anyway because I needed more hood clearance for a later plan. I had to drill a hole in the motor mount bases and **** them, but they did fit. I later changed to the correct thick ones (ebay, I recall, ~$10 ea) because my Federal p.s. pump (later) was hitting the K-frame. I used that because I used an aluminum w.p. I think the factory TRW pump would clear with the thin mounts. You should adjust the differential's pinion angle if lowering the engine.