go with a smaller carb, some may dispute this, but trust me it'll like it more. Highest CR i would run with aluminum heads is 11:1 if your lucky, 10.5 pushes your luck with iron heads. Also full manual valve body in a 700r4/4l60(e) is a big no no, there are alot of transmission failures related to them. Also pick a smaller cam, thats a really healthy cam for a SBC, especially if it sees any street use.