B post cracks Herald convertible

[Lance Smith]

There are cracks in both B posts of my Herald convertible emanating from the rear seat pan level.  See pics.  Is there a recommended procedure for fixing these cracks? Is there a repair patch kit? I am installing a new carpet kit, so now is the time to fix this.  I imagine welding a strap of steel across the crack as a repair.

[ahebron]

First off would be to drill the end of the cracks to stop them spreading.
Has it been tweaked for tub spread in the past?
I cracked my saloon body where the top deck meets the rear guard rh after tweaking 

[KevinR]

As Adrian says, drill a hole at the end of each crack to "arrest" them.

Then I would weld them (leaving the hole) ensuring good penetration of the weld.

[Lance Smith]

I welded the crack closed and the welded a 0.060" thick patch over the top.  I faired in the transition with plastic body filler and painted the surface. time to fit the new carpets.