Tinster, you are misunderstanding my issue here.
I have had my engine rebuilt by a race shop at a cost well into 5 figures just for parts and labor. I paid for it to be engine dyno'd so it would be run in (and so's I'd have some baseline as to the effects of the new parts). I have a new driveline, using a professionally rebuilt transmission, a rebuilt propshaft, a new rear end using a R200 diff, a bunch of very expensive welding work and a custom rear halfshaft/hub configuration. There is a set of rebuilt carbs (with an extra replacement because it has a triple carb conversion). It has a new radiator, an electric fan, totally new fueling system from the custom stainless tank forwards, and too many other goodies to list that I did personally so I know are done right, but you get the point...
So what you might say?
All the work listed above has been done by a mechanic in a LBC shop, not by me. It started out going in for an engine rebuild and some diff reinforcement for the LSD. Fair play, I added some "Might as Wells".
The car has been in the shop for a year for what I'd have figured was probably 2 months work.
Three months of that year is my fault, I spec'd custom pistons that took extra time to make. So lets call it 5 months.
I should have had it back in April.
I got it Friday and it still has a problem.
You on the other hand are doing all the work yourself. And more power to you. I wish I'd had the space to pull the engine.
My point is that I've paid for a car to be totally gone through. I expect it to run, run well, and not to have problems. If I can't drive it when I want, where I want, then whats the point?
It ran better before it went into the shop - then at least it only needed a valve job...
Perhaps now you can understand my frustration. If I'd done the work myself and it wasn't right it would be a different story.
Sorry, I'm venting this isn't personal. I just took out the offending thermostatic switch and found that the autoparts store near me doesn't have anything that will work as a replacement. Now I have to try to source one. Meanwhile the car is up on stands. Again. And if I don't get out of this foul mood it'll be on Ebay by month end.