Re: Oil filters on flatheads
The crank case ventilation system on these things is wide open to the atmosphere. That means that fine abrasive dirt particles can, and will get in the oil. Poo-poo the bypass filters all you want. All the oil gets filtered quicker than you would think and any filtration is better than none. If filter availability and cost is a concern, use a remote filter adapter that takes a modern Ford or GM screw on filter that costs less than half what the stock filter costs.
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