i have a 88 iroc and had a new engine put in.i have two hard lines coming from the firewall one straight, one with a elbow .if there was a heater control valve there is'nt anymore.my question is since i have a carb and no plenum and no hc valve where can i hook these up to and does it matter which one goes where also do i need a heater control valve?also they have a soft hose coming from the carb to the firewall i guess it is going to my heater controls.i still have that canister behind the headlight if it even works.