When rebuilding the 430 for once I went by the book on all the Tq specs. In the past it was only for the big stuff that "really mattered" Bought a 1/4" digital tq wrench to do the little bolts as the other 3 I had just would not work. Have a 3/8 beam style that was the closest thing but no where near accurate. What surprised me most was how tight 4 Lb really felt while doing the oil pan and valve covers. I had been probably under tightening them for years going by feel. Only time will tell if it leaks but so far so good.