1968 3919840 Big Block 427 & 396 Square Port Heads
 

I have a set of 3919840 square port heads dated C-11-8 and F-18-8. The heads have 2.19 size intake and 1.88 size exhaust valves and are a bare set but include the studs and guide plates. The set is not ported but has been milled $1100 for the set and will consider selling them as singles. 330-770-2517