Rico,

I had to replace the exact same hose- it was hell. The part # is located
on some obscure part of the hose, which I found out when taking mine in
to the dealer (the microfiche for the '83-'85 hose routing is cryptic,
at best).

So, my advice is to take the hose in to the parts dept.; they will know
where to look for the part #, so your order can be processed soon- which
will be important, because this hose is NEVER in stock and you will have
to wait for two weeks for the hose to come all the way from Germany.
Budget about $40 for it, too. No kidding!

I would try to avoid using a standard heater hose for more than just
aesthetic reasons. The larger end is on the cylinder head, of course, so
your adapter would have to go on the T-piece side. Not wise, especially
seeing as how your T-piece could be one of two different kinds, and
besides, with two different hard materials expanding and contracting at
two different rates, you could have a great opportunity for air to get
in your system.

By the way, when you install your precious new $40 hose, see how hard it
is to slip it onto the T-piece. If you have to spend 10 minutes to get
it on, you will be in fine shape- you have the new, better T-piece.
Otherwise, replace the one you have. Also, while you're at it, check the
condition of the big hoses running from front to back- you can actually
get non-dealer replacement hoses at American car hose prices. This is a
good opportunity to change them. How's your water pump doing? :-)

I'm sorry to be such a downer, but this is the best advice I can give.
If you fare better than me please let me know.

Best regards,
Sam

P.S. I am recommending consolidating your replacement of coolant system
parts because of the tedious refilling process. I have some time and
sweat-saving tips, should you want them.

Best regards,
Sam