To clarify: my 802 is lag-bolted to the wood blocks only. There is no positive connection between the blocks and the pad.
When I poured the pad I installed four j-bolts to match the four holes in the 802 (not an easy feat). After I discovered the results of having it bolted directly to the pad was less than desirable (the glasses in the kitchen cupboard were clinking together) I abandoned that idea.
Then I tried putting the isolation pads under the generator and letting it float on the bolts, almost no improvement.
That's when I remembered the genset was quiet and low-vibe when it was sitting in the driveway on wood blocks, so I tried various iterations of blocks.
In the end, blocks worked the best. I drilled a hole in the bottom of the wood blocks to accept the j-bolts - it's not bolted, it's just a pin in the hole - that keeps the block from walking off the pad. The generator is lag-bolted to the top of the blocks to keep the generator from walking off the blocks. So there's nothing holding the generator down to the pad, if it were to jump up at all four corners simultaneously it could theoretically depart the slab.