I know that most people are making their intakes from aluminum. I dont have access to a TIG (and im poor, so id like to avoid paying someone). I do have access to a MIG welder though and I have an old fire extinguisher made of pretty thin guage sheet metal I would like to make an upper plenum to bolt to the lower runners of a 2.0 DOHC intake. Id like to take a stab at fabricating it myself. What are the drawbacks to making the intake from steel rather than aluminum?