Quote Originally Posted by zebra View Post
a 5.3 crank will get you a high compression 5.3 with those flat-top 4.8 pistons. as for any other differences - someone else can chime in on that
If you use any crank other than 4.8, you also need any rods other than 4.8. The 4.8 got longer rods to make up for the shorter stroke.