Just a bit curious, why would you want to 5.0 a sport trac?
The "second gen" that isn't particularly too different from the first gen got the 4.6, and those have a much better power to weight ratio and gets better economy than the 5.0.
I will agree- out of the box, a 4.6 is far better power to weight ration wise. After working in a parts store and a shop, a few things I have come to consider about the whole 5.0 vs. 4.6... (Forgive me if I'm stating anything obvious here)
1.
On average, the 5.0 is cheaper to build at a reasonable budget, and has a larger aftermarket than the 4.6
2. The 5.0 came with forged Crank and Pistons out of the box from '86+
3. The 5.0 is a slightly stronger block and can take more abuse (again, on average)
4. The 5.0 has a better torque potential than the 4.6 w/ some minor mods on a reasonable budget.
Also, I agree with most of the other guys on this forum- the suspension setup of the gen 1 tracs is nicer- IFS and solid rear axle... The second gens have IRS, which I don't care for... Nice on the highway, but kinda limited off-road. In addition, I really like the fact that my gen 1 is essentially a hybrid of explorer and ranger parts from the '98- current rangers. The second gen is build on the '05-'10 Explorer platform, with more premium priced parts.