This car never seen winter and has no rust. Odometer has 55K. 

Modifications: 

1990 VNT Daytona engine and turbo (turbo IV) 
Heavy duty drive axle 
Soldered a "second frame" for the radiator support which has ripped apart in the past from too much torque :-) (nitrous + boost) 
16" shelby CS rims from the 1990 Daytona Shelby 
205/55/R16 tires 
Turbo II intercooler and hoses. 
All 1990 turbo IV electronics (computer and solenoids) 
K&N drop in filter 
No blow-off valve !! 
Running 12 psi on low and 14-15 psi on high (with bleed) 
Castrol Syntech 5w50 oil 
Fram HP1 Racing oil filter (very large, it gives me half a pint more oil than a regular filter) 
NGK V-power spark plugs 
Manual switch for the radiator fan 
Using the A568 manual transmission 
Gauges: Digital dash, Autometer liquid filled 30 PSI boost, oil pressure, water temperature and finally a Monster tach 
Just added an Intellitronix (cyberdyne) air/fuel meter 
Removed some weight (Spare tire, jack, subwoofer boxes, rear carpet and old soaked insulation from the trunk) took out about 100 lb, added ~ 10 HP) 
Changed front suspension with Shelby's from a 1990 Daytona (see better cornering) 
Changed camber to -0.5 in front  and stock in the rear for better cornering and launches. (Much better cornering : Can take a corner at 40 miles an hour with no tire
screaching when I could barely do it at 32-33 miles. 
Took off a/c belt 

Relocated the VNT Solenoids on the firewall behind the intake manifold 
This resulted in very fast response (Shorter tubing) from the turbo and more power (don't k 
And it also almost eliminated the spikes (again shorter tubing). 

Installed the two stage boost controller (switch with common selenoid).