thanks for the input, I am picking up a manual out of a 450 SL today, along with its drive shaft and rear end. Going to try to get it all running first before striping it and stating the race prep. Need to work on which rotors and calipers I can upgrade to also.
The race is mainly an endurance series, so I am going steel strings for the simplicity. with air, you run into problems of dependability (can't go to the auto parts store for parts) and it the variable height mess with the alignment ans geometry.
sounds like a good idea to put a standard box in the car,,plenty of off the shelf parts too,,pedal box will fit from man trans w108..grab a manual drivers side window winder assembly as well.....mercedes rarely ran manual trans,,,in fact even today the guys in germeny who build the 450 slc for racing use the auto trans,,Mr Waxenburger My Hero and the designer of the 6.3 w109 and who was always at the front of racing in mercedes ran auto trans in the slc class in the 80s,,,he had millions to spend and still used the auto box...im using auto this year but have 2 good dog leg close ratio getrag 5speed boxes that i have in mind to fit if the auto box dosnt suit...
on your brake upgrade..i wanted to fit bigger discs and calipers which i bought from a newer model amg car..i have been told by someone i trust and whos been building hi perfornce classic and modern mercedes for many many years that the spindles and suspension pins cant take bigger brakes.just not strong enough..so again im taking his advice to start with and have got standard size hi performance drilled and grooved discs all round and ebc red pads,,braided brake lines and so on,,all off the shelf by the way and not expensive..
getting back to the air ride..im fitting newer tech control system but running the original air bags,,the tank bigger than original and of alloy has been moved into the car,,,its really simple this way,,a days work and 500 us dollars total..also you dont loose engine power on air pump as you run electric comp and only when you need it...good also as you can reset the car for different tracks and fuel wieght and so on...every body is fitting air suspension systems at great expense,,when you have one on your car..
im sure you know best whats good for you but i can only tell you my thoughts after years of building my car..
love to see how the car is geting on..