Conversions & Swaps LSX Engines in Non-LSX Vehicles
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lm7 5.3 intake swap?

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Old Feb 5, 2014 | 10:21 AM
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Joe Lluvia Avila's Avatar
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Default lm7 5.3 intake swap?

im still finishing up some details on my fox body 5.3 swap. the truck manifold hits the stock hood. if i swap to an ls1 intake, can i use the same truck fuel rail on it?
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Old Feb 5, 2014 | 11:35 AM
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if i remember correctly holes on the car intakes are smaller then the ones on the truck intake. so you can use the truck injectors if you drill the holes out.

i remember reading something like that a while back but i cant remember which thread.
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Old Feb 5, 2014 | 11:41 AM
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What year 5.3? The truck fuel rail on most is taller than the intake. I think the new flex fuel ones run around the back of the intake...
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Old Feb 5, 2014 | 06:13 PM
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i'd be interested to know this as well
I've been told by a local guy than none of the rails/injectors will swap between truck/van intakes and the ls1 car intake.
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Old Feb 5, 2014 | 06:21 PM
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I recommend a matching rail. Your injectors won't fit the intake. The rail could be used if you wanted to cut it up and splice in hose for the crossover, but otherwise its taller than the truck intake was to begin with.

I suggest finding an LS6 intake. My 5.3 choked out above 5k with the LS1 intake.
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Old Feb 6, 2014 | 04:45 PM
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looks like the ls6 and truck intake are almost identical performance wise. i'm just going to keep the truck intake and just get a cowl hood instead for clearance.
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Old Feb 6, 2014 | 08:49 PM
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Originally Posted by Joe Lluvia Avila
looks like the ls6 and truck intake are almost identical performance wise. i'm just going to keep the truck intake and just get a cowl hood instead for clearance.
What he said just get a cowl hood.
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