Inter ab110

I have an ab110 under resto .it has 4 wheel disc brakes ,is this normal or an after market add on?
I want to fit a holden 308 and turbo 400 however this means the transmission handbrake will be deleted .Any ideas on how to solve this problem eg ,rear axle replacment options etc.
also did anyone find an answer to the wheel stud pattern question .I thought ford might fit but have yet to try it out.

a lot of the little inters had 4 wheel disc brakes from the factory ..i cant help you with the handbrakes question..but some dodges were automatic ..torqueflite 727 gearboxes were used . . i could be mistaken but some range rovers used a th400 auto? ..see if the handbrake drum from a rangie could be used?

Thanks for the lead Kenny i,ll look into those options