specifications MKI, II, IV

Hello everyone,

I looked on the forum the specifications of the different models, but I only found that of the MK IV.
While loading on the Internet, I had already found other specifications and I confess that I do not know which to trust.
Could you enlighten me?
The first file includes the LOLA GT MK VI and the GT 40 "street version".
The 2nd file takes what I found about the MKII, MK IV and MK I 68-69.

Thank you all.