What engine is in this Datsun 510?

What engine is in this Datsun 510?

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bumperino

Looks like a 350 Chevrolet V8. Popular swap into just about everything.

tree fiddy?

I was thinking 90's LT1, but the valve covers don't seem chevy-like.

Tree fiddy

Look more at the intake manifold. Clearly a mid to late 80's Chevy small block.
Besides, you can see the Chevy bowtie on the valve cover in the first picture.

First pic the valve cover literally says Chevrolet with the bowtie

Idk, probably some LS.
I posted because I want to see the drivers footwell. That engine looks like it's so far back from the stock firewall that there isn't any way the drive could be any taller than 5'10".