Edelbrock heads with OEM manifolds

Kenflo said
Does anyone have any experience with using OEM cast iron manifolds with edelbrock aluminum heads? Apparently, according to edelbrock installation manual the 2863553 (68-70) drivers side manifold will not work. Will the 71-73 year drivers side work? Also would the exit port be the same size on a 71-73 vs the 68-70?

So they hit on the left with 66 manifold’s. I ground a bit off the head corner and bought a header flange to space it out 3/8”. Toth heads and ‘73 manifolds same story but Bruce knew where the water jackets were in his heads and I was able to take enough off the head to install the ‘73 OEM manifold.