I agree with everything Jono's said about welding it
What I'd do is a bit more radical-that drawbar looks like a Friday Aftenoon Special.
I'd do it this way:-
Remove your FUBAR drawbar and the T piece.
Cut the flat plates that clamp round the drawbar off the main chassis rails.
Buy a nice big chunk of galvanised box section that's a bigger section and with more wall thickness to use as a new drawbar.
Trim the chassis rails back a bit to suit the bigger drawbar and longer thicker clamp plates-use 4 bolts instead of two in the new clamp plates.
If possible,bolt the drawbar rather than weld it to a nice shiny new T-piece.
Use a different method of U-bolting the T-piece to the main rails-those plates on one edge look like they'd support some cheese but not much more.
Obviously there'll be a bit of 'making it fit' in there-but that 2 bolt clamp,U-bolted T-piece plate and welded T-piece that Admiral made it with are (scuse the language) worthy of CAN.
The results should be a bit like the pic below.