[Cobrakiller]

Hi Chris,when you do the torsional and beam testing you are ideally looking for a linear twisting from the front to rear. What you don't want are stress concentrations and abrupt changes in the chassis as it twists under the load. Ideally the stress should be evenly dissipated along the length and breadth.Its hard to tell with out seeing the whole chassis, but the butt welding of the round to rectangle section will cause some stress concentration. Splicing the two would have been preferred, however you could try some gusseting and try to blend the two together. If you are going to perform your own torsional test, this will show any weaknesses. Its not that hard to do and is the only way to see if your mods are going to work. Good luck with the rest of your build.