engine rebuilders recommend

Jasper are the number one re builders in the nation with a limited warranty of 3 years or 100,000 miles. Be sure to change the oil at 500 miles with conventional oil only and also the next oil change at 3500 miles with conventional oil. On the next 3500 miles you can change to full synthetic oil. You also need to change the harmonic balancer when installing the new engine for the warranty to not be voided. Keep accurate records ( receipts) of all oil changes as well as receipts related to the install including the new harmonic balancer. I always get a long block so the warranty covers the heads as well.

Follow up have the oil changed by a shop provider that will provide a receipt. Even if it is Walmart

I would buy a Ford factory rebuilt engine. Contact your dealer.

Factory rebuilt engine ? What is that ? Do you mean factory crate engine ? That is also a rebuilt engine not done by FOMOCO .Although ford dealers can install a re manufactured engine , it is not re manufactured by FOMOCO but rather an outside outside vendor operating under Ford guidelines.Jasper exceeds those guidelines and is highly utilized by FOMOCO dealers.