I tow 9000 lb in town 3 times a week stop and go and need a little more low end power. I did a search on more low end power and found it is better to add power before changing gears. My question is will my rebuilt stock auto and # 53 block hold up wit an EZ or is this wishful thinking. Should I Leave it alone and just make due. The truck is 4x4 3500 EXT cab. Thanks