Most of guitarist David T. Walker's albums have been in the funk and soul jazz vein, including this 1970 release. Walker was previously spotlighted in this post and you can read more about him there.
Zea Records released Plum Happy in November of '70 and a single Love Vibrations/Doo Doo was issued to promote the album.
Doo Doo on the 45 was about a minute shorter than the album version, contrary to what was printed on the label.
Doo Doo (45 version)
Plum Happy is not available on CD or as a download. Fortunately David T. Walker himself has uploaded the "A" side of the single, Love Vibrations, to YouTube.