Fino's D27 Knuckle Stud Project

Thanks Fino, for your help!
Here is what I ordered from Mcmaster, to accomplish this spot facing project.
#2814A87. 5/8 “spot face” counterbore.
Also ordered a 21/32 but was on back order. #2814A361.
#3103A29 pilot to match the above. 5/16”
I did order a #3103A3 pilot 3/8” figuring I could turn it down for a more precision fit, but the 5/16 seemed to work fine.
Turned the bolt head diameter as Fino suggested with a drill.
Didn’t have to take much off and if the 21/32 bore would have been here even less. Three and nine position heads got reduced in thickness for turning clearance as Fino discussed. I am working on an early Cj6 (longer turning radius) so the amount I removed from the axle housing was negligible during mock up and more for just in case, as Fino already documented. Your results may vary.
This isn’t machinist quality but trued up the drill press as best I could, and bolted the knuckle from underneath the drill press table x 2. Secondary to dry fit, all looks good. Waiting for the locktite to dry.
Mcmaster isn’t cheap but if you are old and have ADD like me, they are quick.
Hope this helps.

 

Great information from all! I will follow this thread for future use when I tackle my knuckles.

 

James did you use locking nuts on those buttonhead bolts?

 

James do you still have the 5/8" spot face counterbore? I worked on my jeep today. Getting ready to put the powr-Lok in. I have the steering knuckles out and all cleaned up. I ordered the buttonhead bolts a few minutes ago. Figured I would do the steering knuckles while I had the front axle out.
Thanks

 

I understand the 5/8" "spot face" counterbore. What do the other 2 tools do?

 

Thanks James. Wish me luck.

Oh by the way when I pulled the 2 front axles I was amazed at how much of the sludge grease had followed the axle shaft back towards the diff.

 

Do Dana 30 front ends need this same modification?

 

...and they come from factory with knuckle studs installed.

 

I got the tool from another member. Took a few minutes to do the spot facing. Now I am waiting to get the passenger dana 27 2 hole knuckle and do the spot facing for it. I will have several buttonhead bolts left over, let me know if you need any.

 

James I was going to do a write up on this very subject. I have the R&P 4wd disc brakes on all 4 corners. The front disc's are from a chevy pu 1/2 ton. Due to the thickness of the bracket I wish my bolts were 1/4" longer. I ended up having to use special locking nuts so I could get them past the end of the bolts. In my personal oppinion I think disc brakes up front and 11" drums in the back is the way to go. If you need any part numbers for the disc brake calipers let me know I just purchased the 2 front ones. The rear disc's are from an S10 blazer 1985.

 

For what ever reason R&P 4wd uses S10 1/4 ton disc brskes on the rear and 1/2 ton chevy disc brakes on the front. Now this is manual brakes with no power booster. They are just good brakes not great brakes. FWIW here is what I just put on may fronts.

https://shop.advanceautoparts.com/p...orrosion-coated-front-right-18-4035/5620015-P

https://shop.advanceautoparts.com/p...corrosion-coated-front-left-18-4036/5620007-P