Poly 318

[guymd]

I bought a used exhaust manifold for a 410 many years ago, and I may actually have the broken one with a casting number on it. Perhaps that would help identify it even if the casting numbers are different from time to time. Also, I seem to remember that we decided the engine was Plymouth, the less expensive half of Chrysler at the time.
I hope this helps a bit.
I'm away now, but I'll be back home in 3 days, and will make a note to send you a picture of the old manifold if I can.

- Sandy