I think what Grigg installed is so much better than the old helper springs that you may want to consider that approach. You have so much under your control and those bags can be inflated when you want.

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed

My Chevy Master 4 Door is on the Road!