I have recently been convinced to use the Holley gearotor HP150? electric fuel pump because it was a great pump and much quieter. In the build I didn't want an electric pump because of the sound and additional possiblities of failure. Of course the AC compressor lower mount option didn't allow the space necessary to use a mechanical pump on the ZZ4. I don't like it, it's loud and roaring. I've already went and got vibration isolators and mounted it to them and that didn't help either. Suggestions welcome.