Why are you welding in a new bulkhead? Is it too much of a bitch to swap out?
How is the wiring loom going to handle the swap? Just build and extension for the steering wheel circuits?
Well, my RHD bulkhead already has rust issues with the cowl and windshield lower support pieces, so it is the same amount of work to chop those pieces out and weld in new as it is to weld in a new complete bulkhead. One could, I guess, weld in just the firewall piece, but that would be even more work. If you don't swap out the bulkhead, then you are faced with a whole bunch of chop and hack stuff to move the steering column, dash, and brake/clutch master supports, and the bulkead stiffeners are not symmetrical besides and would get in the way.
Also, the heater blower needs to switch sides, and that means a dfifferent heater box and new ductwork (the ductwork is different LHD to RHD). Also, the parking brake needs to change sides. The windshield frame needs to be changed to put the wipers on the right side. There's a lot to it.
The wiring loom isn't as straightforward as it first appears. There are certain wiring circuits that need to come out on the right side - like the battery main feeds, and the lines to the engine and EDIC, and the lines for the rear lights, sedimenter, and reservoir tank sender, and then there are lines that need to swap sides, like the brake reservoir, the speedo cluster, pedal box switches, etc, etc. I already re-did my entire loom; now that I am going to LHD, I need to unwrap it again and re organize it a fair bit. PITA. At first I hoped I could just flip the harness around, but no cigar.