The Griffin universal that Summit sells will do fine. I just put one in my 69. Mine is an Afco, but is just about identical to the Griffin.
Afco:
http://www.dragraceafco.com/
I used a 26"X19" in my 69 and had to cut the edges of the core support a little. Stock was 24" wide. A 22X19 should be a bolt in for you. Just have to make some brackets as these are "universal radiators.
You have two choices for outlets. Chevy style has the bottom hose on the passenger side and top on the driver's side. Ford and Mopar is reversed with the btoom hose ont he driver's side. 69 and earlier Mustangs have the bottom hose on the passenger side and will need the Chevy style radiator. You will also need new hoses to match the new locations. For the top hose I used a hose for a 70 Bronco with a 302. Fit perfect. The Bottom hose is Auto Zone # 103. Don't knwo the application. Just went through their hoses until I found one that worked.
It cools great. Made about a 15° temp difference vs a 3 core copper/brass.
Some pics on my page at:
http://home.bellsouth.net/personalpa...04&ck=&ver=3.0
For more pics click on "photo albums" on the right
Later,
David Cole