Are these manifolds of the correct shape for 1966 chevelle/beaumont with big block ?

LH casting 3994045
RH casting 353030

There is a continuous cast flange. All the ones I have seen pictures of have a break between the ports on the flange.

According to casting number reference they are 1973 to 1975 "police".

This would mean full size car and probably not of correct size shape for 66 chevelle/beaumont.

Comments ??

If the casting #'s are for a full size they won't fit.