What options are they for aftermarket intake manifolds for the lt-1?
I know edelbrock makes some, and I know about the lt4 or porting a stockintake.
But what other replacement intakes are they?
Ive seen pictures of sheet metel intakes but I cant seem to find them online, are they just "one off" custom intakes?

 

I think that is about it.

 

i dont know what the power handling of the stock one is, but its pretty high. you are pissing money away unless you are heavily heavily modded. even the lt4 intake isnt worth the money from what I hear

 

The only reason you would want a different intake is if you were running an LT4 head and need the 0.10 inch taller intake runners to match up with the head. Study your intake manifold for a little, it's an aluminum cave with 1.5 inch long runners to the heads, all you can really do is get a bigger plenum, and I can assure you that without some HEAVY mods you're not going to have any problems with the size of the stock plenum. If you already have a cold air intake and header back exhaust it's time to start looking into a new top end. Until you have a new top end you're really not going to get anything out of even a new throttle body.

 

^^^agreed. unless there is something wrong with the intake you have right now, you'd be wasting your money on a new one