Originally Posted by protc3
the axle is the only thing that should be lowered.the spacing between for each spring is important.there should only be maybe .010-.020 preload on each spring for both or there will be too much load on the washers.this will make it difficult to dampen the rear pod and have it work freely and consistant.i guess turning the standoffs down on the cross brace will make them uniform but there will be quite a bit of difference in the spring tension.
Sorry, that is incorrect. On the IRS conversion the top plate sits lower than the stock one. If you lower the cross brace the same amount (by shortening the standoffs, as Doug said) it lowers the whole damper assembly, maintaining the damper spring length both top and bottom and does not alter the pre-load.