Reminds me of my friend, Joe. Got his 440 back from the dyno and we slid it in one night. It ran great on the dyno but ran like crap in the car. I called him at 6am the next morning with an idea.. The only thing we changed between the dyno and the car was I took off the fuel pump block off plate and bolted his old pump on. With no regulator, 10 psi was too much for the Edelbrock. We put a regulator on, dialed it to 5# and back in business.