Check the drain fitting at the bottom of the radiator. It has a replaceable o-ring - or you can replace the plug for a few bucks. Check it really well, because it's hard to detect a slow/intermittent leak there. Coolant from the plug can drip onto the frame and migrate to another drip location before dropping to the ground.

Frank

'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum