So the upper trim models have the 10.3" rotors and fits the wilwood kit https://wilwood.com/BrakeKits/BrakeK...ord&option=SEI The wilwood kit also fits all other 10.3” rotors and this really makes me think that it will not fit the carb model cars. I don't think anyone is willing to spend the money to find out...
Another popular brake kit for Hondas is a 986 boxster caliper which several companies make radial brackets for. This is one and they specify the caliper mount centers to spindle centerline, it is 76mm for a 10.3" rotor civic. See here: https://honeddevelopments.com/produc...-mounting-kit/ They have another kit for the 9.5" rotor, but do not specify the measurements, so I emailed them and checked the mount center to spindle centerline on my DX and I got 60mm. Here is that kit: https://honeddevelopments.com/produc...r-mounting-kit
So we might have another brake option that fits, but I haven't really found a lot of 986 calipers for a decent price... The bad thing is now the carb cars might have no other aftermarket brake alternatives, one can definitely be made, but it's tricky. What I really want is this radial mount kit, but with wilwood calipers instead of Porsche ones
What I need from someone with an 88/89 LXI or sei is the measurement from the centers of the caliper bolts to the middle of the spindle like the pictures below. I already checked the part numbers for the knuckles and they are different, but have been superceded to the same part.