Anyone know where to get a plug for the exhuast manifold where the smog tubes 'used' to be? I have checked a few industrial supply places and they said 'you cant run without that smog stuff'. Anyways, long story short...I am ditchin the smog pump and tubes becaue my '90 never came with it in the first place. I need to put a plug into the place where the smog tube used to enter the front of the exhaust manifold. Anyone know the size of the fitting or what they are called exactly and where to get them?? Thanks!!!!!!