Is connecting rod bushings needed?

hey guys my machine shop is getting ready to hang my KB pistons on my stock rods. He teels me he is going to inlarging the rod to accept the wrist pin and driil a hole for oiling the pin. So the pin will have no bushing. He said he has been doing it for years with no problems. the shop is well known in my area . the engine is a mild 383. what do you guys think. thanks