Scat stroker crank main bearing question xtra clearance bearings?

The motor will see plenty of street use and some drag racing so I’d prefer to have more clearance. I intend on running the engine hard, otherwise why build a 390 stroker? :-) The Machine shop also wanted to see at lease 0.002 clearance on the mains. It’s a cast crank. I also wanted to use full grooved main bearings. The mx540hx bearings with more clearance are pricier and I’d have to buy two sets to make one full set of fully grooved bearings. Is it common for new cranks to be cut an extra 0.001?