[grumpy]

Hyde,
Take an Alka-Seltzer and relax, it just a brass core unit from Visteon (GO-DAN at one time, PF*^)$78 another time, and, they changed names so often) is owned by FORD, at least was?, who knows tommorrow.
Bob,
The Serck pins on bottom were 270 MM apart from the center and at the center top, 12 mm brass pins/bolts cut off to 20 mm, and brazed to channels attached to the upper and lower fin trays. You will have to ignore the aluminum many tube customs and later radiators in the COBRAs, since they are high cost options today. Bearing in mind the heat exchange rate factor of brass (w/m degress cent) is 380 or so as compared to less than 200 on aluminum. Then they are much beefier for the pounding in street use, with brass being 330 tensile strength vs less than 40 for aluminum. The big fan in back quiet often is the secret anyway, it will come on about half as manu times as the similar fan with an aluminum radiator liker the Griffin 25282-X or whatever number they now have on the alum one at Summit.
grumpy