Rock auto has a radiator for $86 for your truck That's the best solution. You could use a sealer to stop it temporarily I think your truck was a 94so if your heater core did get clogged it is easy to change. Maybe I can start a debate about the use of radiator sealers. (Evil grin)
2004 Ext Cab, 4WD, 4.0, Auto, 146k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 3/10/2016)
2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).