This might date back to Playin' It Cool as the relationships were already in place at that time and Vince Malamed had three co-writes on that album along with Josh Leo.Lovin' Talkin' (TBS, Josh Leo, Max Carl)
One Day Away From Love (TBS, Josh Leo, Vince Malamed)
That's How love Can be (TBS, Josh Leo, Vince Malamed)
Around the end of 1981 Josh Leo was substitute guitarist with Jack Mack and the Heart Attack and Max Carl was the lead singer. Vince Malamed and Josh Leo toured as part of Glenn's band.