EFI guys are LYING OUT THEIR BUTT when they say it is the same cost to go to EFI if you are buying new. There is a computer either way and the carb one is cheaper, got to buy injectors and a carb is cheaper than new injectors unless your buying the flavor of the week custom carb, the fuel lines are cheaper especially if your EFI needs a return, EFI needs fuel rails that are usually extra, the carb fuel pump is cheaper, the fuel tank is cheaper, the wiring is far easier and if your paying someone to do it then it is cheaper, no weldin in O2s for a carb unless you want them, no buying O2s... and none of this is using parts you have laying around, his car already has a nice fuel tank and fuel lines for a carb so he could literally buy a carb, intake, and ignition controller and that is it.