Conversions & Swaps LSX Engines in Non-LSX Vehicles
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Old Oct 1, 2011 | 09:49 AM
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lemkerailroad's Avatar
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Default Trans maTching

I am building a 2001 5.3 out of a truck and need to know if the 350 turbo will bolt up but if not what will bolt to the engine

what other parts will need to be changed as well

by the way......i am punching the 5.3 to fit a standard 5.7 ls1 crank, rods and stk 10.5:1 pistons

is their a special flex plate to fit the crank as well


dave

Last edited by lemkerailroad; Oct 1, 2011 at 10:09 AM.
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Old Oct 1, 2011 | 05:00 PM
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This..

Flexplate, Spacer & Bolts from a 6.0l/4L80E 2500 HD..



You will have to oval out the holes for the smaller convertor pattern on the TH350.



TH350 installed behind my 408 in my MCSS.
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Old Oct 1, 2011 | 09:12 PM
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That trans mount looks pretty flimsy
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Old Oct 1, 2011 | 10:03 PM
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Originally Posted by the_merv
this..

Flexplate, spacer & bolts from a 6.0l/4l80e 2500 hd..



you will have to oval out the holes for the smaller convertor pattern on the th350.



th350 installed behind my 408 in my mcss.

does it have to be from a 2500 hd or would a flex plate out of a workhorse truck with a 6.0 work......

Great work on the install


dave
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Old Oct 1, 2011 | 10:54 PM
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Needs to be off and any LSx engine that had a 4L80E behind it. The 2500 is a good search vehicle when looking for used parts on car-part.com
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Old Oct 2, 2011 | 01:24 AM
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or just oval out the holes on your 5.3 flexplate and use the Hughes performance crank spacer.
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Old Oct 2, 2011 | 12:31 PM
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Originally Posted by Pocket
That trans mount looks pretty flimsy
It's been working fine..that pic is before I bolted them 2 pieces together.
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