I am buying a 1992 Dodge Dakota this week and it needs a radiator for me to drive it home. What radiators out of what vehicles would work for this truck. Also it needs a front clip too, what front clips would work for it?

 

When I start my truck... it gets warm... once warm and in park, the RPM's rise and lower 200 RPM's. Why? It also does it at stop lights but only 100 RPM's. Can someone help... thanks!