Lion - "In My Youth"

In My Youth (same on both sides) (Mainstream 1969 - US promo issue)

I can't quite put my finger on this. I hear a bit of early Flamin' Groovies in this but, no, that's not it....

Here's the first of Lion's two 1969 singles on the no-frills Mainstream label. Promo copies like this, with the same track on both sides seem to be most common. I've also seen a copy listed with "It's Too Late" as the flipside, and another GEMM listing has "Ramrod" as the flip. The only thing I could find on this record is a copyright, listing Stephen Burgess and David Fuller as the writers. My guess is they're American. Does anybody know who they are?

I haven't heard the second single, "Natural Man" b/w "Sometimes I Feel Like Philadelphia," also written by S. Burgess. Um, help?