Actually, pound for pound, the H.O. V6 has a better torque ratio than the hemi. But, using the V8 would still amke more sense seeing that most limo's use a v8.

2006 Pontiac G6 3900SFI GTP Coupe CAI, Stainless Cat Back, Vector Tune, Strut Brace, Eibach Pro Kit, Custom Made Projector Headlights, 4300K, 20% Tint Former Owner- 2000 "Stryped" CSVT CEG Dragon Run- Oct 13-15