We need some help. We have a 46 1/2 ton. Switching the front end out with Firebird front clip (don't yell at us too bad, working on limited budget! Sorry!). Any helpful suggestions? We know the centerlines of each axle must aline in order to get it to fit under the body. We have measured and remeasured and we are just looking for some direction to reassure we are on the right path. Any help would be greatly appreciated! Thanks!