70 Dart S6 to 383BB conversion - Cast Iron Manifolds

MoparMike1974 said
2951861 C body 383 / 400 / 440 70-73

2899876 B&C body 400 / 440 1972

...from Galen's casting # book.

I may have a pair of these. I'll take a look asap. If OP is interested