I've determined that the two outboard attach bolts on each gear leg are just a bit too short, since I'm using the stronger (but taller) NAS1804-6 nuts instead of the shorter, stock nuts. The result is that I don't quite have 1-1/2 threads of the bolt showing. The nuts are not Nyloc-type nuts, so they don't necessarily require 1-1/2 threads showing, but I don't want any concern from a DAR or FAA inspector about the installation. I'll have to order longer bolts. I'm just not sure which ones yet.
UPDATE: I did some research and discovered the NAS6606-36 bolt, which has an identical grip length to the NAS6206-36 bolt that's supplied by Grove, but its thread length (and overall length) is about 1/8" longer. Should be perfect.