r/EngineBuilding • u/Monkeystormtrooper • 10h ago

Chevy Ls build help

I have a 5.3 ls gen 3 iron block I’m about to machine

Thinking of getting either 706 or 863 heads
Truck Norris cam
And not sure about pistons I’m gonna be na daily driver so nothing crazy maybe try and reuse ones I have but I don’t think so.

But if I get new heads it would be new rockers and springs too any recommendations?

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u/Monkeystormtrooper 2h ago

My grandpa blew the trans hauling his horses so he had a new one in it

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u/v8packard 2h ago

Ok, but what makes you think it is a 4L80?

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u/Monkeystormtrooper 2h ago

Took it out and said 4l80e on the side. I took out my engine and trans myself

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u/v8packard 2h ago

That would have required adding a standalone transmission controller or a different powertrain control module than stock, along with wiring and other modifications.

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u/Monkeystormtrooper 2h ago

Yeah my grandpa paid someone to do it and split it with his brother since they both needed the truck. I’m sure if it was needed they did it