I have both a steel drivers guide and a nylon drivers guide kits(on differnt trucks) from Engnbldr.com. I was very pleased in the manner he does business. he is very knowledgable about what he sell and only sells stuff he would install on his own stuff. also 4Crawler has an excellent write-up on his website Project 4Crawler with step by step instuctions on how to do the t-chain replacement with out removing the head. I used a print out of this along with my Haynes to do both of mine......Karl <img src="/forums/images/graemlins/pfft.gif" alt="" />