Rather than buy 4 sets of feeler gauges to obtain 4 .035 material for shimming your build. You can now buy them ready to install. You'll receive 4x .035 shims to shim your Volvo White Block.
Note: It has come to my attention that there are 2 variations of the blocks with varying width slots. These shims are for the slot that is approximately 1.525" (38.6mm). The wider slot is 1.83" (46.32mm). I do not currently make a shim for the wider block as I've never had a call for one. If you need the wider shim let me know and I may be able to run a few to accommodate your need.