x3.
I always love to hear how expensive it is to bush the bores. When properly designed in at the beginning of a project, the cost is less than $550 more. If it's more than that I'd be curious how the shop in question is doing it or more to the point getting it done. On a solid roller cam stroker build, that's roughly less than 6% of the total cost. You'll gladly spend hundreds more for the fanciest lifters that you wouldn't need if you do it.
It also is common to assume the only benefit from bushing is oil control. That's overlooking a bit. For instance - given the (cough..cough...) high accuracy of the factory machined deck, and bores, and cam bearing bores, how accurate do you think the lifter bores are? On this particular block, given the oil hole exposure from the factory drilling of the pasage, I'd say the lifter bores are probably a bit off. That adds bad mojo to the valvetrain costing smoothness, rpm, lifespan, and power.
