4" to 4.5"

Longgone said
Hotrodsusa once carried a Wilwood kit for discs to discs. They may still have them. (?) Remember though, any of the new kits are going to be probably 3-4 times the expense of the alternatives described here.

i understand but in france it 's hard to find a 73 or74 or they are expensive so the difference for me is small may be it's better to buy a new one

i will shake to wilwood

thank you