Are cylinder heads on a big block mopar interchangeable?

Answer 1

I know you can put 383 on a 440 and 400 on a 383 but i dont know about 440 on a 383 or 400

All Big Block Mopar B/RB Cylinder heads are interchangeable, there may be conflict with intake and exhaust manifolds on the 62'-65' max wedge heads, also the pre 64' closed chamber heads used a different rocker set-up than the later heads., You can still use them on a later motor just have to use the corresponding valve-train. Any 67' model and earlier head, is of a closed chamber design and will raise the compression of a 68' and later motor. Also, any pre 76' heads will have unhardened exhaust valve seats , which means they won't last long on today's unleaded gas unless you have hardened seats installed...