Hi all
Im building a bit of a project car + will most likely using 4x4 mt75 box with cossie diffs

Just wondering how much power box + diffs will take?
Front diff will have the strengthening plate fitted

The car will only be weighing approx 1000kg + i want to running at least 400bhp
ive heard 350bhp being the limit for the box but wondering as the car is lighter than a sierra or escort it may well be ok with the power

thanks for any replies
James