B44 Parts

[Speiti]

Hello
I'm Speiti from Germany and a big Asso-Fan!! One year ago I bought a B4 and was very comfortablewith this car. But now I'm very proud I'm to say: I also have a B44!!, but I'm not very familiar with it's parts and need your help.
Is it true that I can use the same springs in the B44 as in the B4 or is this just a rumour???
Are there more parts of the B4 that fit to my new B44???
Thank you very much for your attention.
cu Speiti