its a strange thing with the r30 as there are at least 6 different types of r30 engine combos' you can find, to start with you may be unlucky to get your hands on a 82 l24 non fuel injected version r30, then it went to the fuel injected l24e, at the same time there were the hr30 with the l20et and the first dr30 fj20de, the 82 fj20de put out more power than the l20et, something like 160hp to a mind blowing 141hp for the l20et,then the hr30 went to the paul newman version producing 200hp, hard to get these days with that l20et engine. what you want to look for is either the dr30 with the fj20det 190hp or the rsx intercooled version which produced 205hp about 84 or very early 85, the thing to remember is that these are factory claims and also there are both 2door and 4door versions so weight is another thing to play with as they average around 1200kgs' maxing out at around 1300kgs and starting around 1100kgs for the no frills version hr30.
i wont go into the other things like brake size and so forth or id fall asleep!!
there are so many things you can do with any r30 if you have the time and budget!! hope this has'nt scared you of as they are a great base to get a killer skyline!!
must drink more now as people are getting shitty!!
just want to point out that the 84/85 rsx version stuck it to the same year model porsche (if that is spelt wrong shot me mate jp)....