You should talk to Scott Jones in Costa Mesa. He has built 3 engines for me in the past 15 years and his work is rock solid.
Scott built the 390 for my Unique and it is a ground shaker.
He does a lot of Chevy work but knows FE's and how to upgrade the
oil passages.
When my engine was going together there was a 428CJ and a Chrysler Hemi being assembled. His number is 714-540-4381.