This is where I got the '76 pickup info. Read the last sentence. Rex discussing his new bass. He seems a bit confused.
"“Sometimes, it’s not about the price, but the quality, and Epiphone has some of the coolest bass designs ever made, IMO,” says Rex Brown. “I’ve had Thunderbird’s as long as I can remember! There is nothing cooler looking than a TBird… All my favorite bass players growing up have played them!! From Tom Hamilton to Pete Way, these fckr’s Rule, you fool…” Rex adds, “I worked really hard with the Epiphone guys, to design something that has never been done before! The pick-ups were made by Richard Aker, who has been with Gibson for 40+ years. We put the same thumpers that were in the ‘76 Anniversary T-Birds, passive & deadly!”"