Took the ST inlet off and tried my homemade carb inlet off the 1.8 on it. Looks like the inlet will be staying with the 1.8. The ST inlet ports are about 10mm further up and nearly twice as big! Too far away to adjust the other one. So a new inlet manifold is required for the carbs.

On the opposite side the exhaust is on, no real difference in the exhaust ports so on it went without any fettling. I've made a top hose pipe out of B&Q aerial aluminium pipe and bent it to drop under the exhaust. Some slight crimps on the folds but nothing to worry about. I'm going to block the top vent on the radiator and use the vent from the termostat housing. This is higher up and makes for a neater installation. In order to connect the bottom hose I need a 180 degree hose to get the water pump outlet pointing forward. 180 is probably a bit too much but seeing as I can't get a 155 one it will have to do. Its not far way now, apart from the inlet, so will be trying to get it finished over the holidays. Merry Xmas all!