Here is what you need to make it real easy and gives you a T Stat housing. HMM could even use the 351W EFI intakes.
351 Cleveland 2bbl Heads
Price Motorsport makes all kind of intake,head, block combo adapters. http://www.pricemotorsport.com
There's a few guys over at FordMuscle.com running those Clevor engines. I've heard alot about them. Me and dad actually had a long talk about the Cleveland at breakfast last Sunday morning. [That's our thing, go to breakfast early Sunday and talk about engines and race cars.] Unfortunately due to my memory issues I can't remember a damn thing he told me. ARGH!!!! :banghead