Good info, Im still a welding newb and only been welding for the past year or so and am self taught so I know Im still not doing a GREAT job but it gets the job done. This was my first attempt at welding any kind of tube and it was a real pain and took a lot of getting used to. The 5" downpipe was a lot easier than the smaller 3" and 1 3/4" primaries for sure. Its all Mig so I wasnt aware that I could post flow the welds though.
As for the push lok hose, Im a real big fan of the stuff in most cases. There are a few places that I wont even consider it, like tranny lines. But I do need to get rid of this Parker brand hose I have on there. I have heard stories of the stuff falling apart and causing issues. I got it at my local circle track place then noticed after I installed it, it wasnt NHRA compliant so Im replacing it with Aeroquip brand. Also going from a single -8 feed to a -10 feed and -10 return.