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IF there is meat to drill into the sides of the frame at the location where a specific set of angle brackets wind up positioning themselves once mounted to the cradle/crossmember, insulator mount, and the transmission, why not just drill new holes to mount the angle brackets(or weld them on) if receiving nuts can be fitted inside the sides of the frame?
Secondly, I believe the numbers stamped into the angle brackets can be converted into the Toyota part numbers for those pieces. I wrote those part numbers in the related thread elsewhere here. Example: "R-FB020" = 51433-60020 = 8/80 10/82 for the 40/42/43/46 series.
LITP has found the 2 variations of the long cradle/crossmembers to be the same length (which I find to be 20-15/16"/532mm).
There are 3 different insulator mounts that fit onto those cradles: different for the BJ4x, FJ4x, HJ4x. Apparently they all fit the cradle equally but have different thicknesses. So............the selection of which insulator mount chosen needs to be factored into the final position of the side angle brackets chosen to create the overall positioning of the transmission height. Along with the variations in the distance between the frame rails at the actual cradle mount location, this appears to be the reasoning behind the 6 slightly different sets of angle brackets designed by Toyota.
Along with the different tunnel inspection cover heights, different angle brackets, different insulator mounts, it seems that unless replacing a factory-installed five-speed with the same exact parts, adjustments need to be made when installing a five speed where there never was one originally. This is also complicated with the lack for most folks of the rare and hard-to-find 40 series top cover and the distance of the non-40 top cover to clear he inspection cover.
While on the surface the 4x series vehicles "look very similar," the differences start to add-up, and it seems a simple plug-and-play drop in installation doesn't exist for the five-speed conversion, and adjustments need to be made to fit each particular situation. Searching for the rare and unusual parts can kill the enthusiasm for a conversion, so it seems crafting the parts you have and can acquire to fit your own situation might be the best solution.
My thoughts only and not gospel. Value = 2 cents.
your killing me. Worked to get as many correct pieces as possible but now have a bunch of questions. Why do I have two sets of L brackets that match that shouldn't. One from a 82 FJ40 which should be correct and the from 83 BJ40 that should be correct. Still had the crossmember attached to the H55F. L brackets look to match with dirt and surface rust. Transfer case date is 83. The member who picked it for me in Australia seen the BJ42 it was pulled from. So now to figure out what L were supposed to be in the 83/84 BJ42. I do at least have a insulators from a BJ, FJ and HJ. FJ and HJ are off but until I clean up the parts should be able to figure out which is which. Only frame I have for reference is a 82 FJ40. Need to do some research on insulators. Is the 82 FJ40 with a four speed use the same insulator as a 83 FJ40 with a five speed. Can't see why it wouldn't because the main housing of the early H55F is the same as the four speed in the same time period. Figure the difference in insulator had to do with the height off the engine. Tstepp,
My suggestion would be to grab whatever remaining pieces you can, and make the necessary adjustments to make those pieces fit and work for your application.
The support, brackets, and insulator mount are the missing pieces. I have a 40 series top, split tc, and the correct transmission tunnel cover. BUT those last pieces, you are right it can dampen the enthusiasm.

Along with the different tunnel inspection cover heights, different angle brackets, different insulator mounts, it seems that unless replacing a factory-installed five-speed with the same exact parts, adjustments need to be made when installing a five speed where there never was one originally. This is also complicated with the lack for most folks of the rare and hard-to-find 40 series top cover and the distance of the non-40 top cover to clear he inspection cover.
While on the surface the 4x series vehicles "look very similar," the differences start to add-up, and it seems a simple plug-and-play drop in installation doesn't exist for the five-speed conversion, and adjustments need to be made to fit each particular situation. Searching for the rare and unusual parts can kill the enthusiasm for a conversion, so it seems crafting the parts you have and can acquire to fit your own situation might be the best solution.

so with all these "issues" of finding the elusive pieces......has anyone used the 3F bellhousing and later 1 piece crossmember, the crossmember would be easy to shorten and weld an angle on the outside of the frame to bolt the crossmember to.
the bellhousing and crossmember would be "cheaper" to source
The 4/85 and later FJ60's crossmembers are clocked ~5* CW (looking from the rear) due to the change from the 2F to 3F bell housing.I know the FJ62 crossmember is flat and not a cradle where the insulator mounts. Is the later FJ60 the same? If it is modifying the crossmember might be a little easier. Would have a little more wiggle room side to side after mounted. Cradle it really only fits in one spot.
Bear, you speak facts in this whole post, but the above info needed to be stated again.
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No sir. Original tubDid you happen to procure a 1983/84 40 series tub that has the different floor in it as well?
1984 BJ-42 factory H55 truck I had at the shop for a while had a very different tunnel compared to my 1983 FJ-40; it was taller where it needed to clear the transmission.
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Looking at the post 1983 cross-member I see it has a larger radius for the front drive shaft clearance.
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Interesting photos.
Would the "F" and "H" embossed on the rubber indicate gasoline or diesel engine application?
@nogo you wouldn't happen to have a insulator from a HJ47 you could measure the the width and compare the width to the ones from the FJs with the H? While I've never checked it out I heard that the late FJ40s shared front axle parts with the mini truck. Different part number with a different cost, the Land Cruiser being higher. Wish we had excess to all six L brackets and insulators. If the frame changed 10/82 on the SWB it was not enough to change anything for the skid plate mount which have the same mounting early and late. There were no engine changes on 10/82. If the engine mounting on the front didn't change why change the back mount. While Toyota changed the part number on L brackets 10/82 we have only come up with one for each of the three models. Wish I had my two other insulators here in town to measure the other two which might be a F and H.
The B insulator I have is 1 9/16"/40MM in total width. I've been searching as much as I could of the 82+ front floor pan. Only thing I find in common on anything is the inspection cover. Only show two, four speed and five speed which I have both. But I'm not sure I have information on all markets. Never seen one of the 200 US Imported FJ40 to inspect the floor. Won't surprise me that Toyota changed changed the dash but used up some of the old floors since they knew they were ending the 40 series in 83 and didn't plan on importing many. Also knew none would have a five speed. @Bear maybe you have some insight on this. Just not sure why Toyota would change the floor/inspection cover for the four speed and have it different than the five speed when the footprint of the inspection was the same and raised the same on both. my head is starting to hurt with all this info.
and I tell people Toyota kept things simple and easy with the early Landcruisers, parts and pieces easily swap between series per year.
