If its a 4bbl then the heads are 360 heads and its a 360 intake (ports). If its a 2bbl, and after 84, then it should have the 302 heads.
Also good to grab the tranny cooler, oil cooler setup, power steering cooler. I'd grab the intake/carb if a 4bbl. 85+ got the Quadrajet. Thermoquad on 84 and earlier. 4bbl kickdown, too. Lots of M-body nuts go nuts for cop car parts... Lots of useful stuff for the FJM crowd...