looking for new cheap radiators, preferably aluminum, any thoughts?

1-800-radiator, and MSA has a pricy aluminum one. The choice is yours.

looking for new cheap radiators, preferably aluminum, any thoughts?

Forget the word cheap . You wont even find a radiator in a bone yard that is any good , cheap.

looking for new cheap radiators, preferably aluminum, any thoughts?

No such animal. Take your old radiator to a radiator shop an have it boiled out and rodded. She will be as good as new.

what you will get from 1-800-radiator is a piece of junk. Poorly made, won't last like a radiator should. In the long run you'd be wasting money.

If your radiator is still sound (not already ROTTED), follow Ed's advice and have it boiled and rodded. Otherwise, have your local shop RECORE it.

If you insist on an aluminum rad, forget the word cheap.

Here is one on ebay

http://cgi.ebay.com/ebaymotors/HOWE-ALUMINUM-RADIATOR-SBC-TO-DATSUN-240Z-260Z-280Z_W0QQcmdZViewItemQQcategoryZ33602QQitemZ8001060302QQrdZ1QQsspagenameZWDVW

And theres also this one if you really want to get a good aluminum radiator

http://cgi.ebay.com/ebaymotors/1975-78-Datsun-280Z-Aluminum-RADIATOR-280-Z-280-Z_W0QQcmdZViewItemQQcategoryZ33602QQitemZ7965650066QQrdZ1QQsspagenameZWD1V

Just take your radiator and get it redone at a radiator shop....best thing to do--you know where the core came from as well when you do this. I did this for my radiator and my heater core, both are as good as new...had the top cap/bottom cap of the radiator rewelded on (if that's what they do...)

I have two for sale out of a '72 240z if anyone needs one.

OEM surplus has 2 78 radiators. He sell his stuff for about 25 percent of list and they are new. You said you wanted aluminum and his would be OEM. I can post the link if you're interested.