i have a 1988 c1500 sbc with a g80 3:43 gears with 250,000 miles on it. I did a 5.3 4l60e (stock) swap about 2 years ago and i work on it when ever i have spare money and time. Last week i freshen up the transmission put a stout shift kit in it with some fresh clutches. This morning i went out to run some errands and i got on it from a 20 mile roll and hit 2nd gear. I heard a loud pop sounded like my drive shaft came out turned out something metal tore out of the diff cover.My passenger axle wanted to come out i think i granaded my g80. My question is what should i upgrade to for the future my plans are around 450hp for this truck later on. Thanks