I bought a single port Weber carb but I think its for a 1200 or 1300 engine. It won't fit on my 1600 engine. I got it ages ago and can't find the receipt. How much should I sell it for?

Other view.

Its been sitting in my garage for awhile.

The person who sold it to me said I should be able to fit it on a 1600 but it would require modification.

My mechanics advised me not to - after he had seen it - as its for a smaller engine - a 1200.