360 2 barrel heads are they good heads

No such thing as a 360 "2 barrel" head. Different castings were usually used on both 2 and 4 barrel 340/360 engines. Your heads should be either 915 or 587 heads (last 3 #'s of the casting) and are good early production heads.

It wouldn't hurt to keep the 1.88" valves also, especially for a mild build, unless the seats are really beat up or valves are sunk. Stainless nailhead valves flow a little bettern than the OEM tulip valves.

Magnum 360 heads are the worst about cracking. But it is a good idea to have these checked anyway.

Does the trans have a short or long passenger-type tailshaft? Some trucks had short tailshafts. You may have to fabricate a driveshaft.