Hi just want to find out some questions before i proceed with buying a sc14 blower for my 91 vn.

Q1- are they reliable when supercharged by one off these blowers.
Q2- Can you get 5 psi without a cooler or 10psi with a intercooler ?
Q3- How much work is involved in setting it up correctly by that i mean fuel,spark,timing,exhaust ?
Q4 how much power gain can i expect ?
Q5 would it be easyier to turbo ?

thanks.