I wish I had known you were using a pinched frame. I had the same issue and made the same mistake. If you are looking for an electric fuel pump, stay away from Holley if you do not run a return line to the fuel tank. They get hot and puke out. I found that out the hard way, too. Mallory is a much better unit and I have had no issues with mine as it is a different design than Holley. The guys on the Chevytalk.com Performance Forum speak highly of the Mallory units.