Ive just sent some programs to Henstead motorsport with launch control
Vr4 rods will have to be machined down as there 1mm wider on the big end
personaly i'd go for 272 if useing hks,ive tried 264 and 272 from hks and a 264/272 combo but i liked 272/272 better when timed up properly
In fairness theres better profiles out there than hks,you would get away with 280's with huge mid to high end power from other manufacturers,comp do an xr range thats quite good but always go for the one up from the first you choose as there 272 is fairly mild and idles very well compared to the hks 272's