Pass on it. We're roughly the same size with me at 6'4" and also a 40L in RLBL; I tried to rationalize the same issue that you did. Your biggest issue won't be sleeve length, but rather jacket length. A 40L RLBL usually has a 32" BOC measurement, which means that it is one of the only suits that properly covers our ass. IIRC, the standard 40R with RLBL is 30.5" or 31", which obviously can't be altered.
1/17/13 at 3:59am