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if your thinking of going the turbo route in the future go for the square port heads, much better chance of keeping the exhaust gas in the header and not blowing out the side of the crapy copper sealing ring.
forged pistons are a must if your going to go turbo.
you dont really need to go tpye 1 lifters if your going turbo as you wont be using high rpm so the stock size will be fine.
cam wise you want somthing quite mild with little overlap, turbo motors do not like overlap.
rods as you say a few more £ and you can have some h beams and apart from anything else there much lighter than stock. the stock rods with arp bolts will work well just there heavy. not so much of a problem with a low reving turbo motor.
wouldn't bother with the stright cut cam gear as again your not going to be running big rpm with super h/d valve springs. you will need to run slightly stronger inlet springs then you would with a n/a engine, you need to overcome the boost presure as well as the cam lift.
rocker wise you dont have much choice as theres stock and pauter, i run lightend stock 1700 rockers in my race motor that have worked well up to 8000rpm so far. Wally has had a few problems with stock rockers and his turbo motor but i dont think your going to be running the same sort of bosst as he is so shouldn't be a problem.
i get all of my engine parts from stateside tuning and he nows his stuff and will sell you what you need not what he has.
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