These are the ones released on the Super Marauder package;
I don't have full catloging on the early MEL yet and am not sure whether these were offered on the 383 or just the 430 MARAUDER and SUPER MARAUDER. The MERC shop manual for the year shows a completely different manifold (I believe it is an illustration for LINC).
These are from a 1959 383 MERC;
They are somewhat different. Also adding to the confusion is the shop manual referring to early and late cylinder heads and this is answered in Service Bulletins for the 1958 year that I have not aquired yet.
I hope to have my early parts info. soon so as to be able to answer these questions.
But yes, the top shown manifolds were limited to one production year as I understand it.
(And I would like to obtain a set for myself)
