Hi Kyle,
As the others have said, it's best to get a decent used rad if you can find one and afford it. Now! I've been known to "fix" a few items because I was slam broke and even $10 would have made me insolvent. I have repaired many cracks in radiators with JB weld but I've never tried to put a part back on with it. Let me give you a few tips to help your repair have a better chance of working. First let me say that this repair is a "temporary fix" to get you throught a cash crunch and it is posible that it may leave you on the side of the road, but thats the chance you take with these types of repairs. Clean the surfaces REALLY well with a good non-oily solvent. Rough up the surface with sandpaper. Apply the jb weld to the surfaces of the part and rad and re-assemble them in the same position they were in originally. If you can it would help to build up a little on the outside and inside (being very careful inside) to sorta reinforce the joint. Also keep in mind that a lot of pressure builds up in a cooling system so don't be too upset if the joint fails. Let the part sutup for at least 24 hours, longer if you can, JB Weld gets harder as it cures.

Good luck and let us know how it works out.

Tony

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Tony Turner 89 Volvo 240DL 150K, 92 Jeep Cherokee 250K, 93 Jeep Grand Cherokee 189K