Hi, I have the above air cleaner (like a mk2 Cortina GT but intake goes across the rocker cover) that I'm thinking of cutting up to modify. Before I do, I googled it to see what it's worth (I was looking for a 4 barrel OEM Holden/Ford air cleaner and they are hideously expensive) and I can't see any for sale. I know rare doesn't equal valuable so I'm hoping someone here can advise what it might be worth?