Hi. I have put a very big alu radiator in it. As big as it gets without cutting in the car.
The engine isn't bored. It has very few miles on it. Only the heads are renovated, pressuere tested and everything. Well and the camshaft, valves, rods and so on.
It has been driven without the vacuum advance so far. Is that bad? I see a lot of US cars with the vacuum advance disconnected..... :-/
unfortunately, unless you have installed a radiator that is made in the united states of americe, it is NOT the biggest rad you can fit in the stock position.
unless it has 4 rows of 1/2" tubes on 5/16" centers like some rads made in the usa it is NOT the biggest rad you can fit in the stock position.
unless the rad has a tripple pass core, it is NOT as efficient and cooling as well as it can be.
unless it has a high flow thermostat AND high flow water pump, it is likely NOT as efficient and cooling as well as i could be.
Don't know until you give us the info i asked for in post 2.
also need total timing with the vac adv connected.
also, when in the driveway, does the engine rough at around 1600 rpm with the vacuum adv connected?