Not so sure about all that
I study Ferrari's as I love them, they're my cars. The F355 tops out at 183 mph
http://www.ferrarina.com/Automobili/Models/F355/Specs.asp and bear in mind that Ferrari heavily underspecs their cars (i.e. the 360 Modena has a factory spec'd 0-60 of 4.5 but several car magazines have said they'll run 3.9's all day long, and if you look at the aerodynamics of the car and the power/weight ratio and the fact that it's incredibly hard to break the tires loose on that car, that's very believable). If you'll also note on that same page the max power comes in at 8250 rpm. Why would the redline come before the peak of the powerband? Also, that z28 must've either had some heavy bolt-ons, that Ferrari was a sick car, or he wasn't trying you. Even if it was the case that you took the car legit, 100 shot of NOS is alot of power.
I'd also like to note that the F50's are perfectly legal in the states. They sold them here, in fact the cars were sold by allotment, the US getting 55 (out of 349 made) where the car is legal for sale in all 50 states. Italy getting the 2nd most, Germany the 3rd, Asia the forth largest allotment, and the "rest of the world" the remaining cars. It is true that the cars were available through lease only, but that was to prevent entrepreneurs from buying the car only to immediately sell it. At the end of the lease, of course, the car was up for sale.
In closing...Ferrari was a sick company for a few years I'm sad to admit, but by no means did they make sickly cars. The 288 gto has a 2.8L twin-turbo V8 and pumps out 400 bhp. That's in 1984, it runs 0 - 60 in 4 seconds and tops out at 190 mph
http://www.motorbase.com/vehicle/vid/1304365310.html. The Testarossa (esp. the late models) would beat any other stock car on the road with ease. They are well designed and engineered cars (for example, to keep the torque from twisting the car and therefore not all of it getting to the ground, the engine isn't set level in the chassis, the left side of the engine sits a few degrees lower than the right so that when the torque kicks the engine up, it will be level with the ground).
p.s. Anymore ?s let me know
Also, if you want Ferrari's main North American page
www.ferrarina.com
Until then, continue your ferrari research... it allows for never a quiet moment. 
