Is it me or all 3.0s extra weak? I have a 90 auto with the dreaded 3.slow. this thing is the biggset pos I have ever owned. It gets 9.3mpg in town and won't get out of its own way. I have double checked the cam timing, tuned it up and installed manual locking hubs up front all to no avail. It will not pull an empty 4x8 trailer on the highway. It will just barely do 70 on the highway and sometime will downshift to do that. I have tried 3 different tire sizes and all have had the same results. Any ideas short of a 4.3 swap?