Mike, can you tell us the mileage on this Ultra? As a general rule, you will not have to worry about the intake failing and the resulting coolent/oil mix or hydrolock problems associated with the N/A Series II. You may have to watch the intake gasket, though, as these can sometimes leak air from the induced presure of the SC. You should listen to the SC for rattling noises (usually an easy $29.00 fix), and check the SC oil for proper level and clarity. Also check the nose drive for leaks. The L67 Series II is an amazing engine! So long as the mileage is reasonable, you should be very happy.
Just be aware that with performance comes Premium gas prices. You'll get used to it, though.
Retired Moderator, The Bonneville Club www.bonnevilleclub.com
RIP Oldsmobile, April 29
1995 Bonneville SE Supercharged (Stock)
Current Mods: Dirty GYM Sock air freshener.