340 X head advice

65Valiant_NC said
I recently picked up a 340 out of a 68 Dart and tore the engine down. The block, crank, rods and heads check out fine and need very little machining. The bottom end I'm leaving it stock with the exception of a Lunati cam #10200703 (.494/.513- adv duration 268/276) but I'm torn on the heads. I don't know whether to just redo the heads with stainless valves, bronze guides and a 3 angle or do what I just mentioned with some bowl work and intake matching. I have a set of Milodon megaflow valves which came with the engine but I'm gonna have to ship the heads to get them ported. No one in NC will touch them. So to port or not to port? Is it worth it between all the shipping and what I'll gain hp wise?

If you are not concerned about #'s matching, sell the X heads, buy a set of 915 castings from Indy for $500. They come with the big valves and are ready to bolt on. Disassemble them. Do a little pocket port work on them your self ( it aint rocket science ). You are basically blending the bottom cut in to the port and correcting any minor core shift. Depending on the sale of the X heads, you might come close to having a fresh set of heads for free. I have done this - on this.