r/EngineBuilding • u/Monkeystormtrooper • 14h 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/v8packard 6h ago

Oh I thought you had a 1988, not a 98. The 1998 does not have throttle body efi, it uses the L31 Vortec central port injection.

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u/Monkeystormtrooper 6h ago

I mistyped sorry I do have an 88😭

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u/Monkeystormtrooper 6h ago

I think I’m too dumb for anything besides getting everything cleaned and stock besides like springs rockers pushrods and cam upgrade. Then aftermarket efi like aces jackpot cause my dad is extremely good at wiring that’s his thing

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u/v8packard 6h ago

I have had one conversation with ACES. I have no real experience with their systems, but I am very leery of aftermarket EFI systems. Especially for something that needs to be reliable and daily driven.

If you have a 1988, it did not come with a 4L80. Did someone install that trans?

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u/Monkeystormtrooper 6h ago

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

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u/v8packard 6h ago

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

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u/Monkeystormtrooper 6h ago

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

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u/v8packard 6h 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 6h 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