Hi all,
I hope I've posted this in the correct location. While not Skyline specific this is L series motor specific and I thought it worth sharing. My long term home built and home tuned L28 stroker put down 201.6rwhp on the standard 48mm Hitachi SUs from a '71 240Z.
The set up could probably make a bit more power if time was spent further ironing out the needles and playing with the programmable ignition. It's not crazy power but I think it shows that the old Hitachi's in combination with everything else can be underrated.