There are some other mods, too, as you can see that I did to that 4001V63. Eventually, I did put a '60s (rebuilt) magnetic HS PU in the bass, along with a mid '60s TRC as shown in the photos below (which I may be putting on another bass, some day):

- Copyright © Jeffrey P. Scott 2010 All rights reserved.

- Copyright © Jeffrey P. Scott 2010 All rights reserved.
I added the .0047 cap sometime after installing the magnetic HS PU in the bass to good effect IMO.
I put the RI HS PU back in the bass when I sold it, and put the magnetic HS PU in my March '73 4001 (it had also been in my former May '08 4003 for a while, too. That pickups gets around!

):

- Copyright © Jeffrey P. Scott 2009 All rights reserved.
Here is a photo showing that there is quite a bit of string clearance in this particular pickup.

- Copyright © Jeffrey P. Scott 2009 All rights reserved.