My heating radiator is dead, I would like to know if I can stop the water arrivals or if I have to reach the hoses with the engine? I don’t know if you know what I mean?
The only purpose those hoses have is for the heater. You can cap them off at the engine or better yet, remove the fittings and install pipe plugs with Teflon tape sealant.
Or order this https://www.rockauto.com/en/moreinfo.php?pk=3610299&cc=1136663&jsn=578&jsn=578 There is info in the "Sticky" about using this in 52-54 Fords as a replacement.
Some engines do not like to have the hose ports "capped off" because they use the heater core as a byp*** when the thermostat is closed. Y blocks, small block Fords, FE big blocks all have a seperate byp*** hose so any of those you can cap off the ports, no problem. Others you need to use a hose to byp*** the heater by connecting the two ports together.