Circling back: I spoke to Chris at http://www.pyramid-audio.com/levinson.html
He was quite friendly and helpful regarding my ML335. As you can see at the link they have quite a bit of experience with ML gear. They also have engineers that specialize in the differing series, e.g. 400 vs 300.
He also gave me some great advice concerning packing and how the original foam may be deteriorated enough that it won't do the job. How thoughtful is that? He also said that UPS Ground will be fine.
Without seeing it he guesstimated $1600, $2200 if it needed the four big caps replaced. Considering the price of audio these days? Money well spent. They'd also check the smaller ones that can melt their boards if they fail. (yikes!) So yeah, I'll be sending it in here in a few weeks. Will update y'all in a few months.
Thank you again for your helpful advice and encouragement.
Happy listening.