427Sharpe- wonder why these guys confuse the 385 and FE's?
Anyway, Ford Power Parts made a manafold a few years back for 385's that had a removable top 2x4 plate and a 3x2 option too. I think they quit selling those manifolds and started selling Blue Thunder stuff but a call or a E-mail may get you to a lead on a old peice.
Ford power parts is at E - mail address
www.fpp@gte.net . Their old phone number (that may need updating) is 1-512-921-5300
Fax (old?) number is 1- 562- 404-0900
A guy named Ron Miller used to own it I think. He may give you the lead that you are looking for.
cobrashoch