11-22-2018, 01:16 PM | #1 |
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LS semi-swap
I have a high mileage Tahoe. I have a '71 K5 Blazer chassis.
I am going to put the 2001 Tahoe on the 71 chassis. I am going to keep the TH350/NP205 and use the 5.3. A buddy of mine did one in a 72 2WD. There were some frame mods for the A/C compressor and I think something for the oil pan clearing. What issues will I run into by using the TH350? ....all other wiring would remain the same. S |
11-22-2018, 04:16 PM | #2 |
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Re: LS semi-swap
You'll need the spaced flexplate to put a turbo behind a LS..and the t/c bolts need reamed out..other wise ,no issues in connecting the two..
I had to use a vett oil pan on mine to clear the front axle... Does the Tahoe and blazer wheel base match up?
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Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
11-22-2018, 04:55 PM | #3 |
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Re: LS semi-swap
I have not measured either yet. I'm sure they are close but I will end up cutting the frame.
It is funny, cutting the frame bothers me less than that one wire hanging around that puts the whammy on everything. LOL The t/c bolts...reamed for what? |
11-22-2018, 05:16 PM | #4 |
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Re: LS semi-swap
Turbo converter bolt patterns don't match LS flex plate..
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Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
11-22-2018, 05:20 PM | #5 |
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Re: LS semi-swap
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Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
11-23-2018, 01:49 AM | #6 |
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Re: LS semi-swap
I hooked up my 5.3 to a th400 last week. I used this flexplate, it was $56 on Amazon. No spacer needed. ATP Automotive Flexplate z-270. Torque conv. Bolts matched up.
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1977 Chevy C10 SB, Turbo 5.3ls, TH400 |
11-23-2018, 03:25 AM | #7 | |
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Re: LS semi-swap
Quote:
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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11-23-2018, 08:34 AM | #8 |
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Re: LS semi-swap
Sort of like every other project on here....why? not to smart off but because I want to....
Years back I put a 85 S-10 on a 72 K5 chassis. 383 with 350/205 with 4.11's on 35's. It was a neat truck and a **** load of fun. It will not be all that much money as far as LS or conversion projects go. I have every thing here with the exception of the flex plate and motor mounts. The Tahoe was long paid for...the K-5 chassis has a 4" lift, 4.11 rear ends, with a 350/205 that was driving when I parted it out. The body is already gone to greener pastures. This would be my first project with a LS motor but since it will land back in its original home it can't be as big a deal as having to work with harnesses...etc..etc.. S |
11-23-2018, 12:22 PM | #9 |
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Re: LS semi-swap
Hooked up a 4.8 to a th350 this past summer. I used no spacer just the centering ring and yeah you'll need to ream out the flex plate bolt holes about 1/4". I also had to connect a VSS from Dakota digital to the speedo cable so the pcm would know how fast the truck is moving. The trans fluid tube was bit of a problem because of the missing bolt hole. you can get a bracket on amazon cheap that bolts to the back of cylinder head to hold the tube in place. and there is a place on the pass side of the intake to connect the vacuum line to.
Sounds like a lot but everything fell into place one the motor was put in. |
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