Head gasket differences

[scl61]

I see that chevy has 2 listings for the head gaskets kits.
They list one kit for 97 - 01 and a different one for 02 & up.
I have a 98 engine that I'm putting a pair of 243 heads on.
Can anyone tell me what the difference is between the gaskets?
Which one to use?

Thanks

[SeVeReDiStOrTiOn]

I believe the 02 gaskets are interchangeable...meaning either gasket can go on either side of the block. The 97-01's aren't....have to put the driverside gasket on the driverside.....etc

[scl61]

Thanks for the info.
No one else seems to know this much including the dealers.