I used a Radium Pulse Dampener after talking with some of the folks over on the Holley EFI support forum. I 'm using the Sniper Quadrajet version with the 12-303 in-tank fuel pump/regulator/return in the stock tank on my '70 GTO in a dead-head configuration.
The addition of the dampener was vital as I was retaining the stock steel fuel line. The only rubber line used was from the fuel filter (which was mounted to a custom fuel pump block-off plate) up to the throttle body. I wanted to maintain a stock-ish appearance with the dual snorkel air cleaner too.
Here is a link to the post:
https://forums.holley.com/showthread...raJet-Question
Post #7 shows pictures of my completed installation.