Annoying fuel pump....

I picked up an 87 gt this past weekend. It was converted to carb, And has an inline electric Holley pump. Its bolted to the rear bumper and is extremely annoying. It vibrates,and echo's all through the car and makes driving it unpleasant. I was wondering if there was a way to quiet it down with some type of spacer(rubber) or any other ideas. Any info would be great, Thanks

i don't mind hearing the pump(whining etc...) its the rattling/vibration throughout the interior. The car came with a bunch of extra stuff, but i haven't had the time to go through it all to see if theres any spacers for it and i didn't know they came with them. So thanks for the info