Re: Free 2005 Grand Cherokee Advice
If you're a gearhead, have the time/money/tools, just get a junkyard engine (I am sure there are plenty around for 05's-06's), throw it in and drive the snot out of it. If you do that, put some Liberty headers on it, a tuner, and call it good. You should, for sure, do better on fuel economy with that setup than you're doing with the F-150. My 06 Hemi, with almost 100 more hp than stock, normally gets 13-15 in town, and 22-23 mpg on the highway. Good luck on whatever you decide.
Also, look at Strongjeff's threads on the V-6's. His is really nice.
05 LX/RT & 06 WK/GCO, modded similarly, MDS "ON" Light, Vortex Gens, Debadged, DashHawk, BT Catch Can, SRT CAI W/Add Air Inlet, K&N Filter, Sonnax Trans Press Booster, SC Tuner W/Adv Trans Tuning App, DS Tuner, Cust tube headers w/3 in. catback, Bilsteins, SRT frt/rear bumpers, Eibach SRT Lwr Sprgs & Sways, FRI Sidewinder Cam Adv 2*, 6.1 valvetrain, SLP 25% UD Pulley, BBK 90mm TB, SOS Coils/.060 plug gaps. 20 in. SRT Reps.