need help quick

[gp02a0083]

i got a 87 lxi hb and i was taking my brakes off my 89 lxi hb wehn i noticed that the tires on the 87 are 13" and the 89 are 14" and i also noticed that the brake rotors look like there about 1" bigger on the 89
not my question is can i take the rotor and calipers off the 89 and swap it on the 87 and will the hydrolic pressure be ok?
im aksing this b/c my father wants to know if the parts can interchange without a problem

[Vanilla Sky]

there are plenty of threads around here on this, plus there is a mention of it in the FAQs. http://www.3geez.com/showthread.php?t=133

it's an easy swap. all that's required are the frong knuckes, and possibly the master cyl, but i'm not so sure on the master cyl. it may not be required.

[gp02a0083]

well i found out the hard way , i relized that the front spindels are diffrent offset for the brakes

[Vanilla Sky]

you have to swap the whole front knuckle.