Ok I just put in the new heater core for my 280 but none of the auto part store had this part that i need cus its in bad shape. Its the part that the hoses connect to going into the fire wall. Where can i get one???

If you can't find one from any of the NOS or factory reproduction sites I would create my own. I don't think it would be that difficult to fabricate.

check out these sites;

www.datsunzparts.com

www.datsunrestore.com

The Nissan part number is 27190-N3100 (ASSY-CONNECTOR-WATER) From Aug. 73. I bought one a few years back. Not expensive, it was under $12 from the dealer. Hopefully, they're still available. Did your heater core come with a new heater vavle? You might want to change that too while you're in there as well as all adjacent hoses and clamps. I did.

I brought a new one of these about 8 months ago from my local Nissan dealer, so hopefully they are not NLA in that short time since.

Well guys I called everywhere including junk yards around here and nobody had it. I called nissan and they stopped making them a few years ago so I had a guy downtown fab one for me... cost me 30 bucks....but at lest it will work for me.

Doesn't appear to have the 'knurl' on the ends. Hopefully your hoses will seal okay with that. What about the heater valve?

Ok I was going to use the same heater valve but then i broke the little copper hose on the valve. what is the copper hose for and do i really need it???

You need it. From what I recall you'll either have heat all the time or never depending on where the setting was when the capillary tube broke. Problem is, I don't know where to suggest to get one. Took me a couple of months to find one. But I wasn't going to settle for a used one or put the old one back in after putting all that work into the heater. And there are two kinds. One for cars with factory ac and one for cars w/o factory ac. They are not interchangable.

Ouch, these dudes are spendy.

http://www.datsunstore.com/product_info.php/cPath/40/products_id/275

Doesn't appear to have the 'knurl' on the ends. Hopefully your hoses will seal okay with that. What about the heater valve?

You could solder a 5/8" brass compression ferrel on the ends of the tubing

to keep the heater hose from slipping off.

Or find the right part. How many time do you want to be under that dash? I replaced everything with new parts. That was 6 or 7 years ago, not sure if you could find new stuff anymore.