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Originally Posted by 55GMCX2
I'd also like to see the two side by side for comparison.
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See my 03-03-2013 post for left and right 57 tubes side by side. Looking at the end, they are mirror images of each other. It is most obvious in the back end view of the tubes. I really don't think you can go wrong, if they are installed on the "wrong" side, I believe there will be little or no difference in effectiveness. The water exit ports will be on the bottom either way. There is one way of installing them where they appear to be a better fit and that's how I would install them -- and not worry about it being wrong.
Quote:
Originally Posted by 55GMCX2
They said that I could probably get away without them, ...
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I think that is bad advise. Yes, you can get away without them for a while. But the back of engine will run hotter than the front and it won't show up on the temp gauge. Not good for a long lasting engine! I would not use those heads without the water tubes.