Edelbrock AVS 500 #1901 Elec choke

Bought this July 6 from Summit, thought the 500 might give better mpg then 600. I was told by local carb guy it would probably be to small. Have a 4000 mile road trip coming up so I thought I would take a chance. Anyway I don't like stuff sitting on the shelf so it's for sale. Used it for 4 weeks took a couple of road trips, decided to put the 600 back on. The 500eddy 1.jpg ran great, had a little more pep on low end but that was it. $425 new I'd like to get $325, if I do I'll cover shipping to lower 48

It was on mild 318 about 230hp

eddy 2.jpg