Got a newb question. I am building my first rod/car. It is not going to be road legal and is really just a race car to get some cheap fun from. I'm remaking a trans tunnel to fit a larger Rover v8, and the plan is to seam seal, paint and underseal what is pictured, leaving it frequently tacked every inch as shown. I remember reading somewhere that fully welding sheet metal ( I used 20gau) in areas such as this isn't totally nessesary, since it doesn't always make it stronger and can easily cause warping. Is it ok to go ahead and weld it no further? The car is seperate chassis by the way.