Everything you've mentioned appears to be legal. In fact, its pretty similar to my setup. The two-row AL radiator is fine also. As far as I know, there shouldn't be a problem with the '72 engine as long as its specifics meet the class rules. Check with George and go over your combo with him in detail. He'll be able to let you know if there's any problem areas.
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Jeff Chambers
T/S #4
12.40 Seconds/109.5 MPH
http://www.kellnet.com/chambers/default.htm