Yes, the one should completely replace the other, no need to integrate the two. You WILL need ALL the BJ dash and relays as there are differences in the dash and idiot lights as well as the tach. The A/C control is also different though the wiring harness is the same or at least usable.
I have a BJ dash cluster but no other dash parts. I have the dash out, how do I get the wiring harness from behind the defrost air tube. Looks like a lot of unbolting to remove?? Any other areas of concern I should know about?? THanks.