any aftermarket stuff / Improvements ??

Well, on my euro carb 308, i did the following.
custom dual exhaust
electromotive ignition
nick scianna krank vents
deep sump oil pan system
SI Clutch
16 inch wheels
cd player
coolant overflow tank
borgo hi comp pistons
tinted windows
drilled aluminum pedals
steering column spacer

 

an ignition system that uses no moving parts to control spark - instead uses a microporcessor that receives its trigger from a wheel mounted to the CRANKSHAFT, so throw away the distributors, caps and rotors.
also known as a direct fire ignition system - many new cars have them.
you can adjust the timing advance using potientiometers, and it also fires on the exhaust stroke making for an efficient burn.

 

Check my car in my profile, its a 512TR race car, full roll cage, fuel cell, Motec ignition w digital dash, F50 brakes, no mufflers, took almost 1,000 # off the car & it now has 470 hp, looking for 600 hp soon. Is that enough ?

 

There is very little left on my car that has not been changed.

 

A few GTO parts, an intercooled supercharger (around 600 hp +/-), carbon-carbon clutch (in a couple more days), Ohlins shocks/springs, programable EFI, direct fire ignition, Stereo, ....

There are a few other guys who post here with way cool mods to their cars.