I bought a '65 Mustang with a 302 that the guy claimed ran 12.40s. The thing would fall all over itself when any more than 1/2 throttle was given. He gave me a test drive I presume to show me what a wonderful race car driver he was and kept the thing floored most of the time even though it was running like crap and felt only slightly faster than a Prius. I brought it home and removed the carb to find the rear jest had FELL OUT and were laying in the bowl. Put them back in and it felt like I put a plate on it. My point is, don't overlook the obvious. Fuel, air, spark. We need a lot more info than just the name brand of the part and whatever the catalog says the specs are. Be as specific as you can with all the details and you will get a lot better info and suggestions.
By the 1.8 60' foot and 106 mph, I'd definitely say you are down on power everywhere. First, I would get the general health of the engine by doing a compression check and leak down on all cylinders, check lash, check full throttle opening, timing, fuel pressure, trans stall, etc. Then, I'd start by reading your plugs and see if you are in the ball park with fuel and timing. If you don't know how to read them, there are a number of threads on here that go into enough detail to learn from. Post up some pics of the plugs. Then, I would adjust your launch and shift to optimize both. From there, you can see where you're losing ET. Is it the front half, back half, etc. If you're still way down on MPH, then find the lost power. I would bother trying any new parts until you have a good solid baseline and tuned your current batch of parts. Don't assume anything and don't forget to make driving and tuning adjustment in both directions (ie. shift RPM lower and higher, jets up and down, timing higher and lower, etc.)
Cole
