rb26dett help blowing coolent lines

[ej20 love]

so in the last 2 drives iv blown 2 coolent lines do to a cupple things on my rb26dett r32 gtr swaped 240sx. the owners before me put water in the radiator and left it sitting so it had minor rust planning on flushing the whole coolent system. other than that i have one fan idk if i should be running two. also i need to look to see if i blew a head gasket but im hoping the flush and a new radiator might be the trick any ideas. one line that broke was the feed to the temp sensor and the back of the block p.s. broke the sensor too so idk if i should hardwire it. last the other line that broke looked like just a small resurculating valve in the back left hand side of the block. it still needs to be fixed but cant be reached because of the tight swap. help anyone im open to ideas.
trying to get my cam. in the spot to see whats wronge but i cant evin fit my phone.