The 5.2L and 5.9L heads are the same.
The production Dakota/Durango R/T heads are yet again the same.
The Mopar Performance R/T heads are the way to go!!! Magnum style head with much more flow and will not crack.
I have a set and they are awesome in my opinion.
I read on one of the mopar boards where a guy with a flowbench tested the J 2.02 heads (~185 cfm) famed X 2.02 heads (~215 cfm) and stock magnum heads (~215 cfm ) and MP R/T heads (~245 cfm).
A stock Magnum head will flow about what a ported J 2.02 head will flow.
The magnum heads are a direct bolt on for the later 1987+ 318 / 1988+ 360 roller cam engines.