I found a set of Rockwell top loaders perdy cheap and I'm thinking about going that route instead of my current 1-tons. I figure I can sell the new (in the box!) 5.13 gears and install kits and my D60/14 bolt for close to what the new axles will cost. I'm just concerned about having to add more lift. I'm currently at about 7". My front consists of BDS 6" springs and the ORD shackles plus the 1/2" for the D60. The rear is 64" springs from a '98 2wd chevy with a home made shackle flip and 2" blocks. Will that be enough to not mangle my gas tank or oil pan?