I'm sure you haven't thought as far into the process of fabrication but I think I can help you out. The best route for you seems like going with a Toyota Pickup chassis, and T-100 cab, than you can build from there. Not sure what smog laws are for you over there but if you have a pain in the ass law like we do in Cali, than you may want to try and find a smog exempt chassis.
Now I'm assuming you have some sort of good income but this sounds ideal. Small chassis to keep it light, big cab for the head room and further away from the cab cage. You can drop whatever suspension upgrades and motor you want.
I actually want to improve my building from what I learned with my old 86 Toyota back in the day...
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"Dissent is the highest form of patriotism."
I'm sure you haven't thought as far into the process of fabrication but I think I can help you out. The best route for you seems like going with a Toyota Pickup chassis, and T-100 cab, than you can build from there. Not sure what smog laws are for you over there but if you have a pain in the ass law like we do in Cali, than you may want to try and find a smog exempt chassis.
Now I'm assuming you have some sort of good income but this sounds ideal. Small chassis to keep it light, big cab for the head room and further away from the cab cage. You can drop whatever suspension upgrades and motor you want.
I actually have...
1st gen. Taco would be sweet, xtra-cab with 2.7L, 3" bodi-lift, Chaos front end with T-100 axle shafts up front, I'll start with 33" tires, hope to get at least 15" of ground clearance under the front, I tinkered with Scott Sells and ran an over engine bar on my late 86 Toyota and mounted the lower shock mounts on top of the upper a-arm and into the wheel well (that is where the bodi-lift comes into play) for protecting the shocks and to have more room between the a-arms and build skid plates to protect the axle shafts and with the over engine bar mount a rubber boot type of thing on top of the engine (removable) to hold the engine down incase I break a motor mount...
Skid plate the hell out of the front to protect the radiator all the way back to the trans. cross-member...
The rear would be simple, National leafs and with the bodi-lift I can mount taller dual shocks in the rear without having to cut into the bed for the shock towers and maximize cargo capacity...
Also weld a truss over the rear of the axle to prevent the twisting up motion of the axle under full torque loads and get a locker for the rear...
Pre-run bumpers up front and the rear for departure angles rear and approach angles front (front of the truck higher than the rear) and get a mounting system for 2 spare tires on this rear bumper aft of the bed as much to max out cargo capacity for other cargo...
Winch up front and yes a winch in the rear likewise...
Hella off-road lights on top of the cab as far front as possible, speed on the highway is not vital so I would use the roof to carry more cargo and place a 4-point roll cage inside the cab to strengthen the cab just in case...
I am just starting to plan...
__________________
"Dissent is the highest form of patriotism."
I'll try and get out there next year to watch ya run..
Plan it!
I typically run at Road America about 45 minutes from here and Blackhawk Farms down in Rockton, Illionois about 5 minutes from where I grew up (and no, I did not know Danica Patrick at that time, she lived maybe 10 minutes away)...
But with parking lot auto-x I run at Miller Park in Milwaukee...
Yeah racing is done for the year other than the awards banquet at Realtime Racing outside of Milwaukee next week...
I have actually ran at Winona, MN a few years back with La Crosse Region because the mother in law lives in Viroqua, WI...
__________________
"Dissent is the highest form of patriotism."
1st gen. Taco would be sweet, xtra-cab with 2.7L, 3" bodi-lift, Chaos front end with T-100 axle shafts up front, I'll start with 33" tires, hope to get at least 15" of ground clearance under the front, I tinkered with Scott Sells and ran an over engine bar on my late 86 Toyota and mounted the lower shock mounts on top of the upper a-arm and into the wheel well (that is where the bodi-lift comes into play) for protecting the shocks and to have more room between the a-arms and build skid plates to protect the axle shafts and with the over engine bar mount a rubber boot type of thing on top of the engine (removable) to hold the engine down incase I break a motor mount...
Skid plate the hell out of the front to protect the radiator all the way back to the trans. cross-member...
The rear would be simple, National leafs and with the bodi-lift I can mount taller dual shocks in the rear without having to cut into the bed for the shock towers and maximize cargo capacity...
Also weld a truss over the rear of the axle to prevent the twisting up motion of the axle under full torque loads and get a locker for the rear...
Pre-run bumpers up front and the rear for departure angles rear and approach angles front (front of the truck higher than the rear) and get a mounting system for 2 spare tires on this rear bumper aft of the bed as much to max out cargo capacity for other cargo...
Winch up front and yes a winch in the rear likewise...
Hella off-road lights on top of the cab as far front as possible, speed on the highway is not vital so I would use the roof to carry more cargo and place a 4-point roll cage inside the cab to strengthen the cab just in case...
I am just starting to plan...
Just out of curiosity what do you plan to do with the truck most of the time anyways?
I ask because it seems like it would be better if we knew what your plans were for offroad to better justify a good answer to your questions.
Anyways...
What I am talking about is different though. Since you're looking for a Tacoma, pick up a Tacoma frame with absolutely nothing on it. Than go find a T100 cab and drop that on top of the Tacoma frame. Than you can do the suspension upgrades in the front and rear.
As for the cage, set the body lift height from that. Do the cage how I've done mine and make new custom body mounts where the cage ties into than plate the down tubes to the cab instead.
It seems like you have your front suspension figured out but your rear suspension shouldn't be compromised for cargo space over performance. But thankfully to a good engineering idea you can get a good amount of travel in the rear without chopping the bed. The product can be called a "Canti-lever" set up. Luckily Engage is or has one that you can use which is a great set up, but I don't want to get into further details.