[Automotive Stud]

Just a piece of advice for anyone thinking of doing the full filter modification, be very careful when drilling the block. My friend has a rebuilt motor that was modified that way. Everything looked good prior to installation, but when the block was drilled for the full filter modification the drill got into the back wall of the block, making it paper thin. Under oil pressure it gave when the car was running on break in, pouring oil out of the bellhousing.