Bought a Victor Reinz gasket set for my 1.8 from Pelican. Why does it contain two sets of head gaskets?

Two different bolt patterns for different heads.

? I was thinkin' that the gasket set works for both 1.7 and 1.8 so instead of stocking 2 gasket sets, stock just one that works for both.

maybe head gaskets and cylinder base gaskets.

One set of head gaskets were packaged with the cylynder base gaskets the other with what I think are carburator manifold gaskets. My concern, and I hate to admit this, is that I put one set in already and have the heads and pushrod tubes installed. If they are for different heads, 1.7 vs 1.8 I assume they are different diameters. Which means I may have put the wrong ones in. Don't really want to tear the heads off to find out, but I am afraid the nagging doubt will force it unless there is a reasonable explaination for two sets of the same size.

....................well salor....Were the head gaskets actually the same size, as you state...meaning WAS the O.D. the same AND the I.D. the same for BOTH SETS?....

The 1.7 head gaskets are 5mm smaller than the 1.8/2.0 gaskets making it very obvious that something is wrong if you try to install the wrong ones.

And let me ask you this... why are using the head gaskets anyway?

Think I have this figured out, Ham you're right the 1.7 seals are much smaller and would have been obvious. Apparently some of these kits are packaged to accomodate 1.8 and 2.0 engines. The spec's I have seen show these seals measuring 93x104 and 94x105mm respectively. based on this I did put the correct ones in.

This is actually what I was saying, badly apparently. All three sets I have bought, including the one in the garage were set for any of the three engine configurations.