We have made copper/brass radiators for the 6.1l Hemi's for Dayclona and Keisler and they have had good results. I guess it's just about how you want it to look. (a/l vs c/u) They can also be made for less than the a/l ones. Unless you want part #'s on the top tank.

Bob Schirmer
Glen-ray Radiators
1.800.537.3775
1.715.842.3352