Does head choice matter?

[Zorm]

I built my 4.6 stroker with the 92 head. Now I have an opportunity to get a head from a 2000 Grand Cherokee, any advantage to the newer head? valve size, runner size ( I already have the newer intake and mustang TB)

thanks

[jsawduste]

Others may have better info but the 7120 91-95 head is often considered superior to the later 0331 casting found on the 2000. Exhaust port differences between them and the 0331 non-TUPY are known to be crack prone.

Consider the coil pack mounting. You will have to make a bracket to mount the coils on the 7120.

The ECM doesn't care as the multiple drivers for the coil pack are the same part # as the single coil driver.

My OBD2 converted YJ uses a coil pack ECM that was tuned by Chris Jensen.

Again, others may have more or better info but this is my understanding.

[SilverXJ]

2000 0331? Possibly a non TUPY head. Wouldn't touch it with a stick.