Looks and handling are two of the reasons most people perform suspension swaps. Better brakes and ease of installing power steering are others.
While a lower center of gravity generally improves cornering these trucks can be drive safely at any legal speed with the stock suspension. I'm thinking your best bet might be to go back stock.
I'd like to see detail pictures of your IFS install, especially of how the crossmember meets and is attached to the lower frame. Do you have any pictures?
