Thanks guys. I acutally took a dremel to it and was able to get enough countersync to get it to fit a bit better without stripping it. It's still tight, but it fits. Action is much better. It's also for sale at a local consignment shop. I have an '83 on the way. The neck is just too big on these newer ones, though I heard (not confirmed) the thin neck came back in 2006 and is on the C models. The shop I took it to actually had a Chris Squire model there they were working on; very nice bass.
I want an Alemb-ric too! Exact same thin body with the crown headstock, yum! I'm sure Mr. Hall would have a fit! lol