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Topics - tyeler18

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Build Threads / Frankenstein- montero to monstero. LS swap
« on: January 13, 2021, 08:56:23 PM »
Since I get asked about a build thread frequently, I've finally started to compile my pictures. I have no intentions of this being a how-to guide to LS swaps, but hopefully some of the pictures can help people decide if they want to tackle this (simple) swap. I'd like to treat this like a standard build thread to help document the truck for myself.

1991 Montero-

Drivetrain: Gen 3 LQ4 (6.0)
Truck intake
VS Racing 78/75 turbo
VS 44mm wastegate
4" full exhaust
Hooker aerochamber muffler
2.5" intercooler piping
3"intercooler core
4 bar GM map sensor
4L80E trans
NP263 Tcase
Custom steel driveshafts

Fuel: intank walbro 450
Snake eater 1000cc injectors

Cooling: Becool 35202 radiator
Taurus dual speed fan

Suspension: KYB shocks
Cranked torsion bars
Gen 2 rear coil springs
2" body lift

Axles: Gen 2 SR 4.63 rear
Stock gen 1 4.63 front

Brakes: Gen 2 sport fronts
Gen 2 SR rear disc brakes


I've owned the truck almost 5 yeras now, bought it basically stock from a buddy. We planned to pull the 6g72 out for his mighty max and junk/sell the shell. Neither of us knew much about monteros at the time, and I had no idea how attached I would become to this thing.

His mighty max and the montero right after he bought it.

Montero build by Tyeler Andersen, on Flickr

Paid $600 for the truck because it was hit in the front. The bumper was bent and the front grill broken/bent, but it ran and drove great otherwise.

Montero build by Tyeler Andersen, on Flickr

Back at my house, you'll notice in future pictures how much that slammed 2wd mighty max changes after getting the montero. I learned low trucks really aren't fun or practical after mobbing around in the montero.

Montero build by Tyeler Andersen, on Flickr

Montero build by Tyeler Andersen, on Flickr


First order of business was ruining the power, or lack of already, and gearing with a set of 33x12.5 deegan 38s on some old K5 steel wheels. I think this aided to the demise of the already high mileage and under powered engine, but it made the truck so much better looking and fun to drive.

Montero build by Tyeler Andersen, on Flickr

Some testing on the trails behind my house.

Montero build by Tyeler Andersen, on Flickr

Montero build by Tyeler Andersen, on Flickr

I put a bunch of miles on it like this, it eventually burnt an exhaust valve on cylinder 2 and I gimped it around for another near 10k miles on 5 cyls. Finally the waterpump began to weep and I had no intentions of putting money into a high mileage 3.0. LS swap had been on the table from the start, but it was time to get it now. I picked up a complete 6.0 LQ4 for $800. We drove my 4" lowering blocked, mono leaf spring mighty max 70 miles up the interstate to pick this up. It was frame on axle the whole drive home. Not a fun ride back, but we got it. I can't seem to find the picture but I'll post it when I find it. Next was a 4L80 and NP263 tcase, I had no intentions of dealing with the short comings of the 4L60's, the swap would be a lot easier with a 60, but having been in enough GM builds I wanted a reliable trans.

Started with a 2" body lift to make sure everything clears. This actually wasn't entirely necessary as I have a pretty decent amount of room. I plan to put 35's on so this was necessary anyways.

Montero build by Tyeler Andersen, on Flickr

Montero build by Tyeler Andersen, on Flickr

3.0 out, 6.0 test fit in

Montero build by Tyeler Andersen, on Flickr

Mocked up the trans/tcase where I wanted them and to see how much room there was. I have an LS1 swap in my e30 which required a 3lb sledge to portions of the firewall to fit. This was much easier. Minor rework of the firewall for extra clearance.

Montero build by Tyeler Andersen, on Flickr

Tcase to torsion bar crossmember clearance. I ended up pulling the engine forward in hopes of being able to remove the tcase with the engine in the truck. This ended up not being possible, my current position is farther in front of this but it was mocked up originally at this position and I will eventually move it back to this.

Montero build by Tyeler Andersen, on Flickr

I spent a lot of time determining the best route for engine mounts. After going through a bunch of different styles I decided to mimic the mounts in my C5. This allows me to use stock C5 corvette mounts, or any version of C5 aftermarkets which come in shortened height, lifted height, and varying types of materials. Stock mounts were more than adequate for what I wanted as this is a daily driver and I didn't want the vibration acquainted with poly or solid mounts. I planned to use the factory frame horns and making adapter plates off of them, but there was no nice way to do this. Executive decision was made to remove the factory frame horns and weld in frame plates. They are leveled/gusseted and they allow quite a bit of movement to change engine position both fore and aft, height can be altered easily to change pitch.

Montero build by Tyeler Andersen, on Flickr

Montero build by Tyeler Andersen, on Flickr

Montero build by Tyeler Andersen, on Flickr

Here's where things began to snowball. Decided to pick up a turbo setup because why not. 76mm 76/65 with a 44mm wastegate was purchased.

Montero build by Tyeler Andersen, on Flickr

Oh a whim huron-speed had their silverado turbo log manifold on sale. Hoping it would fit I grabbed it, fitment was even better than expected. Like it was made for the truck

Montero build by Tyeler Andersen, on Flickr

Montero build by Tyeler Andersen, on Flickr

Montero build by Tyeler Andersen, on Flickr

Montero build by Tyeler Andersen, on Flickr






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