Ok here is a quote from Ironman regarding the "extended travel" version of these...
"As for extended travel vrs. non, we discontinued the extended travel option as an Ironman 4x4 America Inc. installed option. However at the request of ExCop Off Road we provided the extension spacer free of charge if a consumer wished to install it themselves. It installs in place of the spacer that has the built in washer with the three holes. When assembling the strut, it's the first thing dropped onto the shaft, next the backing washer, top hat rubber/rubber, steel washer then nut."
Here is the TSB for the springs rubbing...
Technical Installation Bulletin for selected Foam Cell Pro Strut Shock Absorbers
45727FE / 45716FE / 45710FE / 45750FE
The outside body diameter of these struts is 72mm. Combined with the nominal 81mm inside coil diameter of the matching springs.
The possibility of the coil rubbing on the body due to bowing in the coil, any brand of spring including Ironman 4x4 coil springs could potentially exhibit a slight bowing once installed which may allow contact of the inside coil diameter to the shock absorber body.
Remedy: During installation, determine the direction of bowing, prior to releasing coil from spring compressor, push the strut as far as possible to the side to increase clearance to the closer side of bowing then slowly release spring tension. Once spring is fully seated, check clearance of inside coil diameter and shock body. There must be clearance at this time to avoid rubbing on the body during operation.
Ironman 4x4 are implementing ways in future production to reduce the severity and likelihood of the above clearance related issues, however due to limitations beyond our control, special attention to avoid these issues may still be required.
And here is the portion of the assembly instructions regarding minimum down travel...
And the quote of that...
"Most Independant suspension systems must retain a minimum of 60mm
downward suspension travel.
The downward suspension travel is measured by the following:
1) Measure and record distance from Wheel Rim to Guard when vehicle is
resting on flat level ground.
2) Raise front of vehicle with wheels fully hanging.
3) Measure and record distance from Wheel Rim to Guard again when vehicle
4) Subtract (Step 1) distance from (Step 3):
(Step1) 770mm. (Step 3) 830mm.
830mm - 770mm = 60mm.
This means the wheel has 60mm downward travel available.
The higher the ride height is to start with, the smaller this measurement will