Im going to be purchasing a 2003 HD in a couple of weeks and I was searching on here about some of the mods you guys do to you alls trucks. I just had a few questions. First, I've read that the stock shortblock is good for around 450rwhp, will the shortblock last long ath this power level? I will have around $1.5k for mods, what mods should I do with this amout of cash? I was thinking $500 for a dyno tune, cai, 6 or 8# lower pully, tranny valve body. If this will not do it, what mods are needed to get to 400wrhp and is it possible with my budget? Truck has 117,000 miles if that matters. Any suggestions greatly appreciated.