I'm familiar with axle shims when lifting a truck to get the pinion slightly higher and lined up better with the driveshaft. Does the opposite apply for these drop blocks? Do I shim the pinion so that it's a few degrees lower?
I bought a cheap drop block kit, which to my surprise is extruded 6061 (not cast) but there's no draft on them. I'll be milling a 2 degree surface on the top of them today.
I lowered mine on 3" blocks and no shim, some do it some don't.