Of the regular RVs the 9 is closest to being the right shape, but it does have a normal empty weight of about 1050 lbs and CAFE got a gross weight clean stall of 58. At 1320 lb a 9 might hit the stall, but built super stripped at best you will have a useful load of 400lbs probably less. Single seat airplane. A RV3 with maybe the same span ratio to fuselage length as the 9 would get it all done. True LSA, no placards, no fishiness.