Hmmmm- your method may have been simpler. A few years ago I sectioned my motormounts by an inch about halfway down the lower half, to drop the engine so the Aviaid wet-sump pan was level with the lower edge of the frame rails. Dropping the engine more than an inch caused interference with the under-engine crossmember and the harmonic balancer-to-water-return pipe as well as the A/C to right frame rail clearance. In race cars, none of those would be a concern. Nice work.