I listed the big stuff
We also installed a steering box brace while the engine was out
And we had to put a one inch spacer between the engine mounts and the frame to get the oil pan to clear the frame
You'll spend the most time messing with the fuel pump and lines
If you have room in your driveway , get a complete donor vehicle ,
We did the harness ourselves and sent the computer to
"Team208Motorsports"
He will do the harness also
And next time we do a LS swap , I will send him the harness too
He modifies the harness and adds a fusebox and wires
So you have three wires to hook up , to the battery and ignition switch and you're ready to run
We used the upper rad hose from the donor truck and also the lower too I think
You need to add a small rubber hose from the thermostat housing to the radatior
Just read as much as you can find and start wrenching
Don't spend too much time researching it
Just enough to feel sort of comfortable getting started and get to work.
If you have questions , ask em .
Once you get started you will understand what you need to do
You do have to have the computer modified to remove anti theft stuff and if your truck doesn't have to be emission tested then the computer programmer can remove the rear oxygen sensors and if you're using a manual transmission they can remove the "torque management " that keeps the engine from making full power because even though GM one of the largest automakers in the world , they are not able to design and manufacture an automatic transmission that won't self destruct behind a V-8 engine at full throttle
We used Dirty Dingo engine mounts
They bolt to the LS and then to the stock clamshell mounts
Depending on the year of your 700r it may have some electronic stuff or not
I'd probably use the Trans from the donor, easier that way to just leave em bolted together and let the LS computer control the Trans
My swap was 4wd and we swapped in a five speed from a 2007 Silverado and that required us ing a NP208 transfer case from behind a TH 400 transmission , new driveshafts etc
Swapped from A mechanical clutch pedal to hydraulic clutch pedal etc
Every swap will be different so it's hard to say exactly what you need to buy and do
And you are correct , a lot of swappers buy all kinds of stuff that you may not need
And may not can afford
We were on a budget , trying to do the engine swap for less than $1500 , we went a little over but not much
To save money I fabbed the exhaust myself from the Camaro downpipes
I smashed the insides from the cats , and cut the pipes and rotated them to fit and welded them back on
I reused the radatior hoses
I did install new oil pan and valve cover gaskets and intake manifold gasket
And water pump since it was so much easier with the engine out
I modified and reused the air intake hose from the donor truck
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