PB-
I used a 2 row aluminum radiatior racing radiatior (From Big End Radiators) that looks to be the same as the one sold at Summit.
It REALLY cooled my 250 but I have switched to a more stock 3 row Mustang/falcon radiator.
Be prepared for a LOT of fabrication if you want to put it in a 63 Comet.
1. Fabricate mounting backets
2. Bend/trim radiator support to allow rad to sit farther forward
(the rad support is cupped at the edges to mate with the standard radiator, but becasue the racing rad is larger, the cupped edges need to be bent flat)
3. No drain/stopcock
(one can be purchased as part of a tube with a valve that you splice into the lower rad hose)
3. Need auxiallary tranny cooler
4. The buliky horns from the 63 Comet had to be removed to allow the wider rad to sit in the front
5. Since the rad was a tad wider than stock and since it did not sit super close to the rad support (see the cupping comments) is was VERY close to my damper bolts, and ther was NO WAY I could get a mechanical fan installed. So I used a large pusher 14" fan.
6. Front Vertical Rad support had to be trimmed to allow the fan to fit between it and te rad
7. Temp switch "T'd" into the upper rad hose with a pipe fitting, but could tap the T-stat housing or install in the stopcock (but I had none).
After all this my car was EXTREMELY cool, almost never going over 160. (with a 160 T-stat), and the fan kicking in only rarely while idling. When I rebuilt the engine last year, I replaced the aluminum rad set up with a 3 row stock rad because my Alum rad had a very tiny leak somewhere.
Good Luck!
