It's hard to say unless you do a compression test.... but to do that, you need to have the heads on the engine and the cams working. If the engine was ok before the cam seized, you could try just rebuilding the heads.... but the main question is "Why did the cam seize?". Lack of lubrication could be from a bad oil pump or insufficient oil quantity - both of which could also have damaged the rod bearings.

Frank

'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum