Costa, if this is / was the Sbarro GT40 found in outside area of Paris, I was sent to look at it to verify that it was indeed an original GT40 , which it certainly was not, and I heard no more from the then current owner. This was in 2011. Frank
Take the slave off the car, pressure test it as is, then machine a sleeve that reduces the bore to either 25mm ( or 22 mm which I use ) and fit a new piston. Pressure test again before refitting. Use -4 Pipeline , not the original -3 . Test on car then fit ali heat shield .
Sorry Doug, the system I am showing is to prevent engine fires from pressurised fuel in the engine bay, particularly relevant to carburettor cars, I have seen too many fires whilst the driver is in the car, particularly on start ups.
Why so complicated ? The whole thing can be done for just a few parts and low cost. Instant fuel pressure dump instantly any of the external or ignition switches are turned off, very simple and very effective.
Yon, Well, I think it is fair to say that I am not surprised it not working, what a mess ! But without doubt you can make a rod change that will transform it. Frank
JP, when you are sitting in your GT40 all strapped in and the doors closed , when you press the starter and see that immediate flash of flames from your carbs just behind your head, when panic sets in and you have get out of the belts, get the door open, get yourself out of the car, open the...