Engine Dieseling - Options?

You had one too eh? I had (for a very short time) a '69 Chevelle 396 4 speed with 220+ compression in each cylinder and it would kill mosquitos for miles around! That thing had such bad valve seals that it would oil foul plugs in 100 miles. Rings were fine, did a leak down test and it passed with flying colors. I was glad someone made me an offer for the car that I just couldn't refuse.
I hurt the decent 396 in my 55 chevy, a friend got a junkyard (but running) 396 for me to put in while i fixed the hurt one. Not a lot of power, a lot of oil burning, but at least it was running, and i swapped em in one day. The flat cam 396 cost me $125. Those days are gone.