Friday evening interlude - A 60s classic

Wednesday's brief item about The Supremes put me in the mood to post some more Motown. This particular number gets an awful lot of play in my car just at the moment. It's the instrumental track laid down by the company's fabled session men, The Funk Brothers, on a song that became a Number One in 1967. See if you can guess the title, and name the artists who subsequently  added the vocals. If you're struggling, the bass line - by the great James Jamerson  - gives the game away at around the 50 second mark. 

A much more famous arrangement topped the charts a year later, although it was actually recorded first. (The company, weirdly enough, didn't think it had that much potential.) I've put the answers in the comment sections. You can hear - and watch -  the finished version of the song by clicking here. To hear the track - and more from the vaults - find yourself a copy of the "deluxe" edition of the superb film soundtrack "Standing in the Shadows of Motown."