So I tried to search and found nothing, perhaps this is a dumb question. After swapping a different motor in (D series B series etc...) Is there any modification necessary for proper exhaust manifold fitiment? What i mean is the connection from the exhaust manifold to the rest of the exhaust, is the distance/sizing universal on those engines? Does my question make sense?

 

yeah I was wondering the same thing, I just swapped from a DOHC ZC to a B16A.

 

anyone....?