From left to right we can see the dust boot, outer housing (already
screwed in to the arm), stud and nut, and seat and grease nipple.
The Howe part numbers are 2247102 for the stud and 22329 for the housing
The dust boot Howe supplied is not ideal for this application as it is quite large and doesn't seat very well due to the design of the suspension arm. Five minutes at Repco solved that problem, and the TE8 dust boot ($7 / pair) is a perfect fit, and nicely concertinaed so it doesn't deform under stud deflection. The springs are not used in this application, and I may actually glue the boots on to the outer of the housing to stop them "popping" off under stud deflection.
The Howe boot on the left, TE8 on the right
After dropping the stud through the housing, the seat screws
in to the housing, and the grease nipple screws in to the seat
The boot is a nice snug fit over the protuding part of the housing