The aluminum intake manifold was never used in the 140 series. Even the dual SU equipped ones come with the integral in/out, cast-iron type, but it may well have been original to the B18 you have, if that is a replacement motor. The number you gave doesn't correspond the to the manifolds used in PVs according to my parts manual, but it may have come from an Amazon or one of the later PVs - I don't have a 122 parts catalog on hand. Check the CVI site. People who want to use a liberated two-hole exhaust manifold look for that intake manifold, particularly if it has the nipples for connecting brake booster and PCV hoses.
Bob S.