When I was a high school student in the early seventies, my second home (when I was not attending school) was a Christian coffeehouse in Springfield, MO named the New Wine Coffeehouse. The guy who ran that coffeehouse, with the help of various long-haired hippie-type Christians (aka Jesus people or Jesus freaks), was a man named Kenneth Asplund. (His sons helped out, and one of them went on to become a pastor of a church I attended later in Springfield.)
New Wine was the site of occasional gigs by Jesus music pioneers like the Children of The Day and Larry Norman. We also had our own Christian "house band" named Rainbow's Promise. They'd started in Texas using another name, which I've now forgotten. The lead singer, Steve Powell, was a handsome guy who reminded me of the actors from the TV sho The Hardy Brothers. He had a very good voice, and the band could definitely rock out. But you do not have to take my word for it.
Amazingly, I just found a YouTube video featuring songs from that album. (Amazing how software can remove pops, clicks and other defects from old vinyl LP records.)