A #8 neck from '83 will be a bit different from a modern #8. Neck interchangeability, even between two 1983 basses, is hit or miss because of the hand made nature of the bass, and a modern neck will NOT be a simple bolt-on affair.
My recommendation would be to contact Michael Dolan of
Dolan Custom Guitars and get a quote. The man is sharp, honest, and has a great reputation in the lutherie and bass communities.
Ken...