Under my K5 (74) there is the front crossmember that holds the tank up. I am wondering if I can romove that member and make my own that goes farther forward. So I can get a longer flatter homemade fuel cell to fit. If I move the member more forward it will be above the rear diff. And I am wondering if the diff will make contact. Other than cycling the suspension to see clearance how will I know. So in other words... Can I move the front crossmember forward to make more room for a longer and thinner homemade fuel cell with out having rear diff clearance isues?