Great reading on your BJ42LX.
They are getting good $$$$ here in Australia now and recently a few 40's have been stolen. Not sure on LX's or not but know one LX that went missing.
I have a 84 FJ40LX that goes along really well. I am building a 40 so great to see the works going on with yours. I still have that ahead of me.
The rear seats are hard to come by, I had to purchase a whole rusted car to get my last single rear seat and then another one for the seatbelt and strap that holds it up allowing easy access to the other seats through the back doors. Yes we have discussed making some fabric many times, will probably happen one day. I was lucky in that the LX's I parted out had okay seats and I kept a swab for me as my seat bottom has a large tear in there so I plan on swapping that out at some stage.
Here's a pic of my LX, 416 beige. Great condition except for a bit of rust in the lower back panel beside the ambulance doors and a broken slave cylinder that I have a replacement part for just no time at the moment. I run the old school ARB bar as these have become popular again here going for $600 min when they pop up for sale.
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The windscreen bonnet brackets weren't on Aussie 40's from the late 70 early 80's. I have a 1982 FJ40 (the yellow thing in that photo) and that didn't have them and most of the other 81-onward ones I have seen have not have them. 40's up to 79 that I have seen have them. The windscreen still has the bracket there so you can put the bracket on the bonnet if you want to.
Here's another BJ42LX (the small yellow one closest to the camera) that I stored for a mate. Running 31's and very standard, MY LX (with old bar) on 33's and my yellow thing on 35's. He sold that for over $35,000AU several years ago now.
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