Right, there were no 71 R/T convertibles built, so the N code was the biggest engine available .
There are "rumors" of 2 '71 Hemi Challenger convertibles, but, if legit, both are going to be JH27R1B .

Greg

Wards Classic Car Radio Repair Specializing in restoration and sales of Mopar A B E body radios
We can restore YOUR radio usually in less than 7 days
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gregward@mchsi.com
phone 256-852-0955


gregward@mchsi.com phone 256-852-0955