I'm just about ready to start putting my front end back together. I ordered a heater core from vista pro (w/o AC) and when it arrived there were a number of rather large solder flakes rattling around inside. This is the first heater core I've replaced, but I have never seen that with a radiator. I assume that's not normal and I'd hate to waste time pressure testing and flushing it.

Anyone have any Heater core supplier suggestions? Not many choices. My first inclination is to return it, but it's going to hold up putting the front end back together unless I don't put the RH fender back on...