97 Cummins 650hp build
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no need for a cam unless you want one. going to need studs, o rings would be smart. head work if you want extra spool etc. valve springs, 165 hamiltons is what id go with. better push rods, exhaust manifold of any sort that wont crack, injectors should be 5x16 or larger, dv's can be many options, 7mm pdd ones would forsure get you there. over flow valve to keep fuel pressure, a good fuel pump. and as for the turbos power driven has 650 horse towing set ups that are very spool daily friendly. you can pick and choose many turbos for 650. depends of budget and how commited to doing it properly. you will need 2 boost gauges and a drive pressure to tune properly.fluidamper, 4 gsk. im sure im missing stuff. a sxe 62/68 .80 t3 over like sxe s472 would be a very good combo that would make 650 all day and room for more