I had a '78 TBird in almost pristine condition. Though it was a joy to play, IMO opinion it sounded absolutely awful. Very grindy and edgy - then again I didn't have an SVT to play through, but it wasn't working with my rig. It wasn't the sound I wanted.
Though I never played a 60's TBird I did have a 2000, and I thought it was great. Night and day difference in favor of the 2000.
Yam BB Club #3; Lane Poor Club #5;
Haggy Bass Club #7; Warmoth Club #18;
Tele Bass Club #24; MM Sterling Club #25;
B.C. Rich Club #52; U.S Peavey Club #306; Sunn Ownwers Club #82