Make sure your pcv system is working properly. If you don't install the the rear main just right it will leak no matter what. Google pcv on the 420a other then that torque issues maybe?
250hp has been done one the Stock block. Seen the dyno video on YouTube a few months back, without megasquirt too lol I thought it was impossible but I'm sure it didn't last long.
You should of went to Ums tuning! Never delt with wingz but I was in a similar situation with a shop in Tucson. It sucks when you don't feel happy with someone else touching your car. Like you said it could have been worse and more expensive. I know others have been happy with wingz so I agree...
Bet it's a bad wire going to the cts which mine does the same thing. If you follow the wires that run over the valve cover by the timing gear you will probably find a short. Try to run a voltage meter and see if it's dropping while the car is running.
Just put it between the firewall and the fuel rail under the throttle body so you can see it. There's a few spots to bolt it on. But why do you want a fpr on a n/t?
Personally I would get a new one since you're doing all that matenience. Just email whoever you got the parts from the pictures you took and they should send you a new one free. You could probably run it but there's no point in doing things twice.
The cts is underneath the top radiator hose. Take the sensor off and test for ohms, one pin is ground and one pin is power you will figure that part out. Gofer listed the tolerance back up top for the cts on a cold and hot engine.
Get some carb cleaner and spray around the intake areas to look for a vacuum leak. Your car will try to stall if there are any leaks. I bet it's a leak rather then the cts but check it out too. A multimeter is super easy to use.
http://www.streettunedmotorsports.com/parts/stm_fuel_pump_rewire_kit.htmYou need this^^ it even comes with complete instructions on how to do it. Can't get any better
Like I said not the best method but for someone that's not sure how to do a compression test I'm sure what I suggested is the easiest way, it's only 2 bolts. And just because the pump turns on doesn't mean the injectors are pulsating.
I bought my ecu through a junk yard finder online it's easy to Google. I got it within a week and it had a warranty. Take the fuel rail out with the injectors intact and try to start the car to see if it sprays fuel really quick. It's not the best method but it works. Then go from there.It...