How is .016 equal to .025? I am not that familiar with small blocks and really never liked the stock lifter, pushrod geometry. I would imagine with all that crazy side load that the lifter bores will wear out on these? I've never seen a lifter that felt "loose" in its bore but again I have BB's. I would imagine that as soon as the lifters started getting loose in their bores that they could really start wobbling the hole out pretty substantially. If they do wear out enough to cause a pressure loss, wouldn't it be a good idea to get them bushed? The bushing will provide the correct pressure even if after time it wears out of spec.