I'm installing an old Offy 4 barrel intake on my 225 six. The manifold has a square flange with bolt holes 4" on center. I'm pretty sure I need an adapter to bolt on a 390cfm Holley. Am I correct, and who's making the part? Thanks

That carb plate is still available from Offie. I would say, call Summit Racing. They should have it in stock.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

thanks.........................matt