Do your home work.

Lenweiler, I found two holley W5 intakes on Racing Junk awhile back when I was looking for one with the 4500 flange for my domintator. They both had 4150 flanges. I dont know what shape they are in but can get you his Ph. number if you are interested. Not sure if all require them but mine has two aluminum plates that go at each end of the intake between the block and intake. Something to think about if buying used one.