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BUSY BOLTERS Are you one?  The Shop Area
continues to pull in the most views on the Stovebolt. In August alone there were over 22,000 views in those 13 forums.
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Jul 21st, 2025 | | | | Joined: Jan 2016 Posts: 264 'Bolter | | 'Bolter Joined: Jan 2016 Posts: 264 | Son has a '81 GMC 3/4 ton. Had a very tired 305 in it, with SM420 trans.
Just recently wrecked his '07 NBS GMC 3/4 ton with a 6.0L, 4L80E
We have full harness, computers, everything.
Anybody done this type of swap? Anything we should be prepared for? | | | | | Joined: Mar 2021 Posts: 389 'Bolter | | 'Bolter Joined: Mar 2021 Posts: 389 | Yes I have dropped a 2013 6.0 / 6l90 in a 1956 3100
The swap is really straight forward if you have all the harnesses and computers.
And the nice thing is you even have the body control module so even more restomod options are available.
I would buy the tuner software so you can easily program the ECM as needed. (I used HP tuners but there are plenty of guys using others EFI live et)
Mountains of information on LS swaps on the internet. Videos, forums etc Bet you can even find one on the 81 getting a LS put in.
Only note of issues that I had to chase down. MY ECM required I delete the starter check along with the VATS and normal stuff. Took a while to find that one.
Soon as I got that set it fired right up.
Mounting should be straight forward. | | | | | Joined: Jan 2016 Posts: 264 'Bolter | | 'Bolter Joined: Jan 2016 Posts: 264 | Thanks hcb3200. Hopefully we'll be getting to it in the next couple months. | | |
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