I have a few to suggest...
Gray's Automotive (I think they are in Tigard). I haven't had them do work for me. But, I know a few poeple who have. And it was pretty impressive. 503-620-4353
Same situation with Larry Kalsh (sp?) in Hillsboro. No work for me. But, a few months ago, he did a 302 for a friend.
I just had a 351W done for my 67 fastback by Ross Racing and Restoration (Forest Grove). The motor is bored and stroked to 427 cu. And I am more than happy. He knows his Ford motors (including the CJs). At a minimum, you should give him a call. 503-992-1700