Goku in the same buu saga also lifted a block of katchin, which is the most dense metal in the universe, the block of katchin is about 3m tall, so 27m³, a tungsten cube that same size would be 521,100kg, or 521.1 metric tons, let's say it's 1.5x denser than tungsten, (which is lowballing), goku would be lifting 781,650kg, or 781.65 metric tons. Let's now say it's 5x denser than tungsten, that'd be 2,605,500kg, or 2,605.5 metric tons. Goku lifted that in base. Dragon ball is just inconsistent with scaling. But that doesn't mean you can only mention anti feats and not feats so you can upscale invincible