Restoration Projects that are a lot harder than amps!
and a bit more about the other side of my life at times
If you think restoring amps is hard .... or restoring cars is hard .... or even boats .... try something like this, a 1965 T-38 with full upgrades, totally
rebuilt from the tires up.

This plane has about an 800 nautical mile range (no reserves) at 36,000' at Mach .94-.96.  It can climb at over 33,600 feet per minute, and do Mach
1.3 (over the ocean, as you are not allowed to do that over populated areas).

You better know everything from machining to hydraulics, electrical to engines ... and be able to have it all certified.  It helps to have an A/P ticket ...
mine is FAA 1303318 from back in the 60s.  This sort of project is a lot more work than any boat I have had anything to do with.

In any case, it is well worth the effort, and expense of 800 pounds per hour (about 118 gallons) per engine of fuel use.  At 41,000 feet you cruise at
.94 mach.  Make sure you also have at least 7000 feet of runway to land this puppy  (6000 feet if you are really good).   Then again, it also has a
drag chute for 5000 foot runways,  and a tail hook if you find a U.S. Navy carrier at sea that would not shoot you down if you tried to land on it.  The
tail hook can be used for land emergencies in airports equipped with the right equipment.   I will race any
civilian from Los Angeles to San
Francisco for amps as the wager, even against a Citation X.

Upgraded GE J85-13 engines with 4090 pounds thrust each and afterburners too.  F-16 baggage pod if you want to travel.  

You can take off in as little as 2300 feet and climb to 30,000 feet in under one minute from brakes released on the ground.

3980 pounds of fuel is her capacity (about 583 gallons).  Figure on using 2000 pounds for your first hour of flying unless you use the afterburner on
takeoff.  If you do, figure 2100 pounds even though the AB was only used for a few seconds.

Click on the photos for a larger image.
Scroll down a bit for some restoration photos of a Czech L-39
At the left ... how it all
starts on a project
like this.
Getting one of these into the USA is not too technically difficult, but it is filled with paperwork and delays, one after another.  First step is to head to
Prague, look a some that are always for sale, and run down massive check lists and inspections of the plane and documents.