These are the instructions I made for this so it kinda simplifys things.
Well here's the skinny on how to do the IFS hub body mod for a 79-85 toyota solid axle:
here's a example of he differences in the two hub bodies:
http://www.pirate4x4.com/forum/attac...postid=1649941
Purpose for this is to widen the axle without running a wheel spacer. This basically makes the front axle 58" wide instead of being 55" wide stock.
Here's where the thread started:
http://www.pirate4x4.com/forum/showt...9&page=1&pp=25
Then it took off sorta here
http://board.marlincrawler.com/index.php?topic=7449.0
Ok first here's the list of parts needed:
86-95 IFS hub body.
Leave all the wheel studs on it keep all the hardware to it including the bolts that attach the IFS rotor to the hub body.
Also keep your IFS Rotors you will need them for a drilling template later on.
You can use the wheel seals and bearings for the SFA hub in the IFS hub
86-95 IFS brake calipers
FJ40 disk brake rotors 81-up
You need longer bolts for the calipers because they attach to the outside of the knuckle mounts when you get done installing the IFS hub body. You can do this two ways either use a bolt and self locking nut to go through all the way or thread the caliper holes with a tap and thread a bolt through the caliper to secure it to the knuckle.
The parts I used for this:
4ea 2" 1/2" grade 8 bolts
4ea 1/2" lock nuts
Here's what you need to do.
Drill out the threads on the knuckle. A 31/64" drill bit will do this nicely. Then use a 1/2" drill bit to complete the job.
Do the same thing to your IFS brake caliper bolt holes use the 1/2" bit to finish.
You will have to trim your dustsheild to fit the brake calipers on the outside of the knuckle.
I ended up trimming the whole thing and removed the whole dustsheild on mine.
Take your old IFS rotor lay it on top of your FJ40 rotor use c-clamps to secure them together using the IFS rotor attachment holes as a template on the FJ40 rotor use a 3/8" metal drill bit and drill them to match the pattern.
The 3/8" drill bit is 9.5mm so it very close to the 10mm size of the diameter that goes through the rotor so you can use the bit to ream it to the right size if need be.
Bolt the newly drilled FJ40 rotor onto the IFS hub body the same was as you would a IFS rotor.
You may have to clearence the inside portion of the IFS brake calipers a little so the FJ40 rotor fits. With V6 IFS calipers there was no clearencing required.
Put the frankenstien together.
I found the IFS caliper will rub on the inside edge of my 15x8 wheels this can be taken care of using a 1/4" wheel spacer or grinding the outside of the caliper slightly so it clears the wheel which is prefered because you are trying to be without spacers in the front.
Hope this helps and thanks for the info on doing the rotor part on this White Trash .