[Brian '74]

Found this:

http://forums.maxperformanceinc.com/...1&postcount=10

[Skip Fix]

The lowering/raising spacers used for trucks and circle track cars can work. I think Guldstrand the road race guy had some smaller thickness lowering blocks also.

[MrPushrod]

i had to make a spacer for mine..........
I was told by calvert racing that if your car was an
original mono leaf car you need the spacer made........
if it was a multi leaf car you dont.................
I forget the exact size ........cal tracs will tell you if you
call them...............and you also have to drill a hole in the middle
of the spacer so the pin on the leafs can go through...........
other than that mine went in very easy.