It takes about 2 hours to convert 235 oil galleries to full flow filter routing, but it must be done with a completely bare block to be able to flush out all the shavings the drilling and tapping creates. Then it's still best to run both types of filters.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!