Boo gives good advice. Also, buy a book on hot rodding small block Chevys. The book will list the small details that we may forget to tell you. There are certain processes that have to be followed when replacing parts. For example, when bolting down an intake manifold, you want to tighten the center bolts first and work your way to the outer most bolts. There are many minute, but important details that you need to know to successfully tackle a project like this.
You need to learn sometime, so why not now.
Phil