I used factory mounts with adapter plates. Transmission mount is factory too. I had thought about going aftermarket for the accessory drive when I had plans for an older LS but for the GenV they’re all too expensive. I’m just going to leave it factory and use relocation brackets for the A/C compressor.Nice, I like the engine and trans combo. What did you use for engine mounts? What front accessory drive are you going to run?