Thanks Jerry, I'm still looking in the local area. I found an engine shop about 25 miles away. Hopefully, they will have something.
Does it matter which distributor (250 or 292) I end up with? I wonder if the advance curve will be a problem in a 235. I've read that a 292 remains retarded longer, then advances quicker than the 250, due to weaker springs and lighter weights. Also, since the 292 has a longer stroke than the 250 it may tend to detonate easier at low rpms, so they keep the timing back a little longer. The long stroke causess the power curve peaks at a lower rpm so they need to get full advance sooner. Does this sound correct or am I over thinking it?
I'd hate to get the 'Big Ugly' and have to experiment with springs and weights. Heck, I'm having trouble locating a complete HEI distributor as it is, finding the correct internal components would really be a wild goose chase!