OK, well I just got back from test driving my car with my new 4 bank SCT chip installed running the custom 93 octane performance tune, and let me tell you, this thing is awesome. Now, I'd still recommend getting a tuner if you have a 96-preset with a custom tune uploaded) but for us 5.0 guys our options are limited to high tech expensive tuning programs, or chips. Well I have to say, this chip is well worth the cost. Not sure about foxbodies, but I do know that sn95 5.0s crap out in the upper revs because the ignition and natural timing settings of the ECU are rather restrictive, and even wit ha more moded car such as mine, it's hard to keep the car pulling in the upper revs. Well this thing fixed that issues, and quickly at that. Today was the first time since I got my car where I was actually shaking when I got out. The car pulls like an absolute beast in the upper revs where as before it used to can out at around 4000 RPMs, which is where the torque died out. I'd like to get to a dyno soon to see what the real results were. If I had to say just by what I felt, I'd say 15 rwhp peak hp, about 10 rwtq, but I'll bet $20 that the torque band is much stronger throughout the power band than what it was previously. Also got an economy tune and can't wait to see what the results on my MPG will be.
Here's my last dyno for reference. I've done a few more things to the car since then, mainly repairs which would recover some lost power.
