I pulled mine a couple of weeks ago - 1k/10k setup with about 7k miles towing. No grooves. 70 ft/lbs sounds high for the angle set bolt. This is from the owner manual: Use a wrench to tighten the angle set bolt until
it comes into contact with the shank and lifts the
head to where the spacer rivet also comes into
solid contact with the shank. Tighten the angle set
bolt an additional 1/2 turn.
The socket bolts are torqued to 45-60. I like 55 and check it every trip.
Lee and Anne
2016 F250 2WD CC SB XLT 6.2 3.73 3,295 lb payload cap.
2014 Salem Hemisphere 282RK 8k lbs loaded, Equal-i-zer WDH, TST 507 TPMS
2016: 33 nights camped; 5 nights booked