engines should be broke in hard. rear ends should be broke in lightly. the best truck my family ever owned was a 85 Suburban with a 350. It was pulling a huge camper all over the country for the 1st 50,000miles on the thruway from the day it pulled off the lot. The think got 17mpg and had more power than any 350 or 5.3l iv ever drove. that thing would roast the tires with ease.
2012 2SS/RSM6SIM, Painted CarbonFlash rallystripes, Elite CC&CAOS 3.91gears,dyno J&JSpeedshop NewEra ported TB,CAI intake,Apex Scoop,Heritage Grill, PatG CamMotion cam,0%Fluidampr,Melling296 Oilpump, KatechC5R chain, CloyesLS7damper,PAC1205x springs and pushrods, Straubtrunions. ImprovedRacing oil baffle, crankscraper,MonsterBillet releasebearing,18"remotebleeder,ARH1 7/8"LTheaders cats,TWMfullShifter,BMRsways,links,trailing arms,toerods,delrin cradle bushings,BK039rear control bushings,front bushings. Idealclutch master,Tick clutchline, ForgstarF14,Invos,SoloMach-XL exhaust