Tailpipe Reference Points

[Chad22873]

I am finishing up the last few things on the frame before I put the body back on my 1970 K5. Currently I am finishing up the exhaust. I decided on this build to run the pipes out behind the rear wheels. In my opinion, it's the only good place for them, in order to keep fumes out, when running with the top off. I have always had them ran straight out the back and on my '71 I have turn downs. My problem is without the body in place, I have no reference points to know how far below the frame and how far away from the wheel the pipe should be. I could wait until I put the body back on but it's so much easier now. Would anyone happen to have some measurements that I could use? Also wondering where the rearmost hanger should be located. As always I appreciate everyone's responses.