#1 How many miles is to many, when adding a super charger?

#2 Take a look at THIS
""Systems are 100% complete and install in 8-10 hours with simple hand tools. No other parts to buy. Everything from the fuel system to hardware comes in the box.""
^^^^Can this be true?

edit: i just realized this should have gone in the tech forum. Moderator would you move it for me please.

 

I would say 70k is too many and the tuner kits for prochargers are worthless.

 

It just depends on the engine and the condition that it is in.

 

70k isnt to much if the motor is in good shape not smoking and not burning oil. i would do a compression check if it checks out ok then go for it.