Air impacts for sure, the shop sound changed very quick in the last few years before I left the GM dealer life. I've got a drawer full of air tools that don't get used anymore.
BC 1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc 1949 GMC 250 project in waiting 1960 C60 pasture art Retired GM dealer tech. 1980 - 2022