I had a Thunderbird that had a twisted neck. I got it in trade, in need of a headstock repair (small crack), and found the twist when it arrived. The three point bridge made it easy to line up the strings (straight/even relative to the fingerboard), so while there was a twist it wasn't really an issue unless you looked down the fingerboard from the top of the neck. When I sold it I priced it accordingly and still felt bad about it even though I did disclose the issue, but its current owner has only ever expressed being pleased with the bass and it went to a great home. That EB might have enough meat to try the heat method, but it might be fine even without a fix.