Hello, can anyone confirm that the transmission cooler lines on a 72 small block TH350 are 5/16" lines? I installed a B&M cooler when I put a stall in and I am adding an Autometer trans temp gauge. I need to add the manifold below to hold the sending unit. Also, is this the best way to make the gauge work or is there a better way? They are pretty proud of this manifold judging by the price. Another thought, if I am spending $52 for a manifold, would it make sense to upgrade the lines and if so, what set-up would be recommended?