stretch104

first off i was wondering what would be a good cam for a 4.8 manual truck. and do they sell aftermarket clutches for the manual silverado's. now will a intake exhaust cam nitrous(100 shot + or -) manual trans beable to handle this much power assuming it makes 350-400whp? and what about the rearend will it need any upgrades to handle the extra power? and will a mail order tune be a good enough tune for this setup and what would be the best place to go for this tune? thanks