Got a noobie question for you guys. I just finished rebuilding a burned up 359 with a new piston & ring and had to use muriatic acid to get the smeared alum. off the cylinder walls. My question is i already have a spare 18" B&C w/ .325 pitch that i want to use on the saw but the drive sprocket is a 3/8. Would it be cheaper to get a new drive sprocket OR a new chain and would i be able to use the 3/8ths chain on my existing bar. I'm also confused about changing the drive sprocket; when you change the drive sprocket do you have to change the clutch drum and oiler drive as well? Sorry for the noobie questions but it's the one area i haven't been able to find detailed information about.