Thanks to all ! I'm gonna read Patrick's instructions,as recommended here. I put a 261 in my 40',rather than a 350, just because it reguired no major modification to the truck,yet is a more modern(usable)engine.I kept the orig 216 which runs great. I rejected putting a different rearend in for the same reason.I want to be able to return to original condition by turning a wrench. I love OLD trucks! I may try doing the 3:55 myself, if for no other reason than I could use this website more,which I really enjoy. Thanks again. jim
