Ken, I'd like to suggest DR Lo-Riders. I've got 'em on my Pedulla 4-banger and I think they may be what you're looking for. Very classic/traditional old-school sound. Here's the description from the DR web site:
"LO-RIDER nickel-plated bass strings are based upon hexagonal cores, wound with nickel-plated steel, specifically designed for a softer feel and a traditional warm nickel sound. These bass strings are even, long-lasting, and loud with a mid-range growl. An excellent string for fretless basses... LO-RIDERS love to Funk!"
Trust me...
"LO-RIDER nickel-plated bass strings are based upon hexagonal cores, wound with nickel-plated steel, specifically designed for a softer feel and a traditional warm nickel sound. These bass strings are even, long-lasting, and loud with a mid-range growl. An excellent string for fretless basses... LO-RIDERS love to Funk!"
Trust me...

