Here is my .02 on Tamiya body's and Chassis:
This chassis has 3 different length settings (a grand option that I've only seen in this kit) in the short setting you will be able to fit most 200mmm body's and 190mm although your tires will be a bit pass the fenders with the 190mm Its looks cool as a GT2 or GT3 will post some photos with a 190mm latter
BTW - I have run it short and it's as amassing fast and grips as good as when set full length.
The Kit bodies however are not as flexible when it comes to other chassis, good luck trying to find a good fit other than the kits own.
You have two lengths on this one: the F103L (came as an Indy car Kit) and it only works for the Indy bodies - its way long.
The Regular F103 (RS, LM, RM and R) and the F103GT
This are all the same length but the GT lower plate is wider and has a different front wing/bumper setup, but still it will fit the F103 components.
Look at my car which is a F103R, with a F103GT lower plate (nice wider place to set electronics and better TA05 bumper) perfect for the Le Mans F103 body.
F103R / F103GT lower plate
You can fit any Tamiya F103 (RS, LM, RM and R) chassis with F1 and Le Mans the including:
Toyota GT one
Porsche 911 GT1
There are many prototype aftermarket body’s for the F103, go to e-bay and search “Tamiya F103 and you will find some of them.
Exception: the F103GT Advan Courrage (see photo in previous post) will not fit well in anything but the 103GT Chassis. The reason being the sedan style wheel base of this kit.
I have seen a couple of F104 looking chassis running this body at TQ. But I have no idea how they managed the longer chassis, they looked ok (none were competitive do) so you can fiddle it in that direction.
Tamiya has yet to produce a prototype body for this chassis. The F104 comes in Pro, Ferrari or McLaren, W and GPW . The W’s have F103 front ends so you can fiddle with tires and F1 bodies between them.
But I don’t see how you could use a LM- F103 body because of the F104 Length.
That’s all Folks!