Yes, if you can "find" the 1.08 venturies, that is possible.
Bit it should still run ok with the 1.21's in it. If that's what they actually are.
My 2150 had 1.34 venturies in it and it performed fine in that respect, but my motor isn't stock either. A stock motor would probably run a little rich is all.
'87 YJ, 4.2L built and bored, 8.5" of lift, 8.8 rear, AX15/NP 231, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...