I saw this on eBay for sale 7/4/23, thought I would pass it on just in case someone has the matching chassis: Factory engine from a 1970 Porsche 914-6. Customer removed from a running car in favor of a larger displacement. Current condition unknown, but engine turns freely. Engine number 6404511.
If this is the correct engine for your car, I am sure that you will be overjoyed!
Engine will be shipped via freight. $4,500.00