I have a new Holley carb. p/n 4548, Ford p/n DOPF-9510-U, purchased in 1983 @ Schmitz Performance on Bailey, never installed, in the box. It’s around 450 cfm, listings are early 289 Mustang, 289-302 GT350, some FE applications, very nice shape. They are no longer made and prices for any available are 250+, asking 150.00. E-mail sunrnr33@msn.com, thanks.