The Estes Brothers - Transitions (1971 psych-rock)

It's not realy that heavy but more reflective, spacious and Jamming
The piano player brings a nice jazzy sound the guitarist has a good sound too
1:http://link-protector.com/731698/
2:http://link-protector.com/731699/

C.C.C. Inc. - To Our Grandchildren (1971 folk)

http://link-protector.com/731700/