My '95 K1500 truck currently has 2" add-a-leafs, 4" blocks, and Hellwig Overload springs. I was originally going to replace the springs with new 6" lift springs until I read an article about a truck that had an Off Road Design shackle flip. My question is; will my Hellwig Overload springs work with your shackle flip kit? After reading about the flip kit on your web site and reading the other "questions and answers" postings I think I know the answer but I had to ask. I am looking to eliminate the blocks but I also don't want the rear to sag when I tow my boat trailer. The "pros" about the flip kit seem to fit my needs(even cost difference) but are there any "cons" about the kit especially concerning the carrying and towing capacity? THANK YOU in advanced for any advice.