Don't get a pisspoor attitude with people who are trying or have tried to help you...get pissy with the dipstick who obviously screwed the car up.
Just because you had the stuff installed and the problem didn't immediately happen does not mean that it is not directly related to the install(s).
That car ran perfect every day I drove it! The simple fact that you have beat the ever loving snot out of it(nearly new drag radials that went to absolute slicks in a matter of 1,100 miles) and have had some hack installs done, I'm not at all surprised that you're having problems with it. If you wanted an absolute bulletproof F/I vehicle you should have purchased a brand new Lightning with a factory backed warranty and left it completely stock. At that...if you had the hack jobs performed on that vehicle and had it towed in for service, the dealership probably would have voided your warranty.
Your peak of stress levels are self induced. Remember that....You need to be responsible for your own actions....When that clutch starts to slip because you have admittingly attempted to spin the stickiest drag radials known to man with a front drive and have been unsuccessful, don't cry to anyone about this and that.
I personally was shocked to see the compression so high after the car's apparent abuse since it changed hands!
Am I pissed off? Yes....sleep in the bed that you made, it's your own fault if it's uncomfortable!