I had the same sort of heat issue on mine, back when it wasn't in pieces. Going through it, it was due to how the heater was bypassed. Does your car still have a heater in it? Are the hoses going to the correct places on the intake? When the engine rebuild was done, ran the by pass correctly. I had one of those Torker intakes, and couldn't get rid of it fast enough. If you are looking for drivability, you'll prob want a dual plane intake.