I currently have my 235 torn apart for a rebuild. It will be back in the car soon, and I am debating on whether to install the accessory bypass oil filter or not. I have read lots of stuff saying it's not neccessary, and I've seen a lot of cars without them. I also see guys who swear you have to have them. I plan on changing the oil every 2k miles, and frankly, I don't like the way it looks and some ebay cash for it would really help me out right now. Plus i have a 292 that will go in the car eventually. So, not just on the Chevys, but for any car that had an optional oil filter, do you guys think they are absolutely necessary or not?