Within the period of 1942-1988.

Joel Whitburn's TOP R&B SINGLES book lists 32 singles that charted 27 weeks or more on Billboard's Soul chart . At #32 ( w/ 27 weeks) is Chaka's AIN'T NOBODY from 1983.
At #1 is CHERRY RED BLUES from Cootie Williams (1944) charting for a 39 week total.
In between those two songs are thirty others , two of which were released through Motown.

NAME THOSE TUNES !!!......????

(I've named the source, but no cheating please !)