I think just a bit more investigation is in order before being disappointed and beginning a search for that other cart. Here's a bit more information that may help with the puzzle:
My conversion from Q4 has the following tracks:
1. Aubrey - 3:40
2. Masterpiece - 13:20
3. Trouble Man - 15:55
4. You are the Sushine of My Life - 6:00
5. Don't Explain - 11:20
6. Easy Living/Ain't Nobody's Business If I Do (Medley)- 10:00
7. Taurian Matador - 8:09
From allmusic.com here's a little info on the double LP released in 1973:
Soul Box, a double LP recorded in 1973, has Creed Taylor's production enhanced by a symphony orchestra and full-blown jazz band arranged and conducted by Bob James. Some of the session men include Ron Carter, Billy Cobham, Eric Gale, Idris Muhammad, Airto, and Richard Tee. Soul Box only contains seven cuts. Among them are truly innovative reads of Weather Report's "Taurian Matador," Stevie Wonder's "You Are the Sunshine of My Life," a sidelong jam on Marvin Gaye's "Trouble Man" (the album's centerpiece and masterpiece), and the deep funk of Norman Whitfield's "Masterpiece." "Trouble Man," however, is the cut on which.....
Here is the track listing for VOL 1:
1. Aubrey (Gates) - 3:44
2. Masterpiece (Whitfield) - 13:22
3. Trouble Man (Gaye) - 15:54
Here is the track listing for VOL 2:
1. Aubrey (Gates) - 3:40
2. Masterpiece (Whitfield) - 13:20
3. Trouble Man (Gaye) - 15:55
4. You Are the Sunshine of My Life (Wonder) - 6:00
5. Don't Explain (Herzog/Holiday) - 11:20
6. Easy Living/Ain't Nobody's Busienss If I... - 10:00
7. Taurian Matador - 8:09
Those familiar with Q8s have become acutely aware that the track listings and even the mixes can differ from Q8 to LP. It appears here that VOL 2 of the LP contains all 3 tracks from VOL 1 plus the additional tracks 4 through 7. I find it hard to believe that an LP will hold 68.5 minutes of music, but a Q8 could.
Maybe Gerardo will post the track listing from the Q8 VOL 2 with times for us. Would you mind, please, Gerardo?
QM