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i am going to install hairpins(front) an my '27 t project. i want the attachment point through the framerails. what is the best method other than threading the frame rails. i' looking for an insert of some type to be rosette welded, i think. also, rather than the traditional heim joint i want to use a tie rod end type joint that can be lubricated. what do i really need to do?
You can weld a bung into the frame rail, but I'm not convinced that is the strongest way to do so. There are brackets that can be welded to the frame that are much stronger.
Check the frame end of the attached hairpins.
If you don't want to go under the frame, the strongest method would be to drill holes through both sides of the frame, insert a section of 1/2" ID DOM steel tubing, and rosette weld both sides. Run a bolt clear through and put a locknut on the inside.
Attach the hairpins by threading the frame rails, and you're taking your life into your hands - at least IMSHO.
Oh, and don't use a tie-rod end. Use one of these:
Tie rods are meant to guide front steering - not to attach suspension and take that load.