Have you considered the MSD Atomic throttle body EFI? The control module can be mounted inside the car. I have installed a couple of these and they work great. $1268.95 at Summit. Also since you can mount the control module inside I don’t believe they will have the RFI issues like the Sniper. You still need to have good grounds. They have the same capability as the Sniper. I had a Fast 2000 on the 512 in my 69 Bee. Loved it but they are expensive.