Checking my '86 GN for it's first tune-up, since I purchase two months ago. ( 28k on Odometer) Looking into a NGK spark plug ( maybe like NGK UR4 ) it's a Cross-over from what I have now installed,which is AC Delco 44TS. Anyone run's NGK and at what gap is Good? .032 for a stock GN.Just getting some thoughts or stick to AC Delco?