[RICK LAKE]

Clois I am not buying the ground the radiator. If the radiator is Aluminium, not a single GM car I work on has a ground strap to the rad. You didnot say what coolant or additive you are using, Distilled water, water wetter, and a 50/50 of antifreeze, that rad should last for 10 years. If you are running a 20lbs cap on the coolant system, that's too much. Where are the leaks at? Seams or where the fins are mated to the tanks? Have any pictures? If the wrong mix of solder is not being used it will leak from fins or tanks. GM had this problem with evap cores for the AC system in the late 80's early 90's. the solder was not 60/40 or 50/50 and the oilin the AC system soften it up and they all leaked out freon. I didn't see a harrison sticker on them either, the new one's came with a harrison sticker and we never had to replaced them. If the radiator is copper, a flush every year after racing should take care of any problem. Radiators should last 7-10 years with maybe 1-2 flushs in there life span. My 85 truck still has the same rad in it with green coolant and no leakes or problem yet. This radiator is copper. Rick L Ps did you get the tires mounted??