Welding and sealing on a 76 frame

[Andy Somogyi]

Hi,

I need to weld reinforcement panel on both sides of the engine compartment here to fit some mounts. I'll be welding in a patch of 14 gauge on both sides here in yellow. I'm also thinking about adding the RSR style gussets to the shock mounts on the crossmember.

How can you get to the inside of the frame to seal the welds to absolutely ensure against rust.

Note, this isn't my car, I just found this pic.

[Flojo]

drill a hole somewhere nearby and spray with flexible nozzle?
Just like people do when they flood their cars with Mike Sander's

[Dpmulvan]

I would back purge it with argon or c25 if you don't have pure argon.