Terry, the Louisville & Nashville RR owned two GE 70-Tonners.
Their initial unit numbers were L&N # 125 and # 126, later changed to L&N # 98 and 99. I don't know what happened to # 98, but # 99 was sold to the Marianna & Blountstown RR as MBT # 99.
The Marianna & Blountstown RR operated between its two namesake towns in the Florida panhandle, and was abandoned in the early 1070's. I have no idea what happened to # 99. Unfortunately, it probably was sold for scrap. The last time that I saw this unit, it was in a really woebegone condition!
The L&N also had four 44-Tonners, as inherited from the merger with the NC&StL RR in 1957. All were later retired and sold to dealers who sold them to various industries for industrial operations. One of the units resurfaced back into commercial railroad operations when it was purchased by the Bath & Hammondsport RR.
BTW, where did the Frisco stuff come from? The L&N had nothing corporately to do with the Frisco!
But, mentioning the Frisco, it had eight 44-Tonners ( one Davenport-Besseler, one Whitcomb, and six GE units), and one 45-Tonner (GE). That's as close as it got to 70-Tonners.