I don't want it long so I'll figure out how to get those out and get this welded back to stock length.
Awesome fiind!

Congrats!
Now the friction fitted tube shouldn't be much of an issue..
feed some penetrating oil into the seam as good as you can,
wait for a while (an hour or such) and use a propane torch to heat the original tubing.
then add some more penetrating oil and start pulling...
that should give you the the expansion and reduced friction you need to get the two apart again.
only remove the inner tube from the front part of the chassis.
cut of to maybe 4" of stick out,
then see how much of the tube is actually sticking in the rear tube..
if less than 1.5"-2" hammer it in a bit more
then just cut a small slit on the underside of the original tube
(trying to not harm the inner) 3/4"-1" from the edge.
then weld the inner tube to the outer one.
Cut off the inner tube to about 2" of stick out, add a bit of chamfer and
put the halves back together
leave ~ 1/8" of gap between the original tubes (cutting blade width

)
measure wheelbase straight as well as diagonally and adjust where needed.
then weld the seam filling in the gap.
once done you can sand/file down the weldbeads to make it one continuous tube again..
as solid as the original was (or stronger)
not having added too much weight either.
'sid