Clark,
First off - you will want to reverse your PCV removal; the engine needs the water and unburned fuel vapour recycled into the intake. Our version of modifying the PCV system (that Ron seems lately to be-evaluating to an extent on a similar vehicle in another post) moves them from an active vacuum line to a passive/variable system as described in the manual supplied with your throttle body. believe me, you'll see some results from that in itself, but be prepared to do some fabrication to increase the size of the tunnel those vapours travel through to ease their passage, if possible. (I roughly doubled mine from 5/16" to 3/4" and it made a bigger difference than I thought)
Next, please consider that we've changed the dynamics of how air moves through your engine by implementing the groove; this may necessitate changing some other things (like when the spark fires) to obtain optimum efficiency and the biggest gains in mileage. This is especially true when you've opened up the gap in your spark plugs (it takes longer for the spark to jump the bigger gap, right? Nanoseconds longer perhaps, but if they're not firing at the right time, you're going to get an incomplete burn and not as much power).
Now, I didn't believe it until I tried it, but TracyG made an argument here that good ignition is a fundamental aspect to tuning a vehicle, and since I've gotten positive results using it, I've become a preacher in that church as well. Not all spark plug wires are created equally: most wires have a resistance to them that increases the longer those wires are, and even wires of the same length can have different resistance between them due to materials and manufacturing. That resistance slows the ignition energy from getting to your spark gap, and reduces the potential size/strength of the spark itself, regardless of the gap. Go shopping at a parts store with a multimeter capable of measuring Ohms of resistance if you don't believe me, and pick 3 different brands of cables for the same vehicle, then measure the longest cable of each. I'll bet you that there is at LEAST s 3kohm differnce between/range across them, if not more, and You'll obviously want to pick the set with the lowest resistance to be on your vehicle. If you want to take that to the extreme, order a set of wires from Granitelli in Caifornia - their Zero ohm MPGPlus wires truly ARE zero ohm, or close enough to it that they are still miles ahead of the rest. If you try this and it brings you mileage results as it did me, AND you get bitten by the ignition bug, you could also look for aftermarket ignition coils with lower primary resistance - that charges a coil faster, and can also make for a more consistent spark across a range of operational variables.
Final thought for now- the tune up, did it include an air filter replacement? A clean filter flows more air to make bigger groove waveforms...just sayin...