Super D:
At what point do you feel a drive shower is necessary? I have an Alpha w/ the 4.3, usually just cruise 'cause the wife doesn't like the go-fast. SD,
Depends on where you boat. If you're in cooler climates and fresh water without a lot of impurities you probably don't need one. If you boat out here in 110 degrees and fresh water with a high calcium content, you should invest in one. There're really cheap, keep the drive cool and also keep it clean in hotter weather.
Ron