I found the options for mounting the external pump for my build (BPE 347 carb) not the greatest. I went with the pro M tank hanger and mounted an aeromotive regulator on the firewall. This has worked flawless and made for a very clean install. I have heard internal pumps last longer due to the fuel bath cooling and are noticeably quieter. May not be what you want to hear since you already have the components listed but may be worth considering. I have a friend that has the external pump mounted low on the frame back by the right rear wheel and has had no problems.