water temp,oil pressure sending units and radiators

[Mackdaddy64]

Good afternoon everyone.I am doing a ls swap on my 64C10 using a 6.0 engine.I`m planning on using water temp and oil pressure gauges.I see on here you guys say put the temp sensor on the rear of the passenger head and the oil sending unit in the regular place behind the intake.Could you provide some insight as to what you had to do with some photos?Next,I`m using a Blazer style fuel tank in the bed but the sending unit only has 1 feed line and I`m using the external fuel pump and regulator which requires a return line,i need help on which sending unit for this setup.Lastly, what affordable radiator are yall using?thanks in advance for help and suggestions.