[Pete]

I welded a couple that were a lot worse than that about 10 years ago and they are still going.
V out cracks so 100% weld is possible.
Wash weld area with acetone.
Pre-heat to 300F.
Tig weld with ER70 rod.
ABSOLUTELY DO NOT ALLOW ANY UNDERCUT.
DO NOT BREAK ARC OFF AT WELD END. CUT ARC OFF WITH PEDAL.
DO NOT GRIND ON WELDED AREA AFTER DONE WELDING. (If you can't lay dimes, get someone that can. This is not an area to be practicing welding on)
Cool under blanket.