Have a 1999 dually v10 with 111,000 miles. Had a sudden engine miss show up a few weeks ago. Poked around on the net and found a few posts about rocker arm bolts breaking. Pulled valve covers & sure enough, #8 intake rocker bolt broken & pushrod laying there. All rockers extremely worn as well. After much research I found that stock rockers and pivots aren't available. Decided to install crower rockers & new lifters. Found one pushrod had rubbed thin on head gasket. Mine measure 7.765" long but parts stores want to sell me 7.900" pushrods. Can get an oil through Chevy pushrod at length I need. Anybody been this deep in a v10 and found the same parts issues?