Wow that's cool yea since they are being put on an 1130 bore you probably don't want 1250 gaskets as the inner bore of the gasket is larger and will drop your C/R. There have been quite a few discussions on these gaskets here -you might be able to search threads for them - the 1130's have brass crush dowels on them as well so you can check to see if your old gaskets will seat properly on the new heads, probably will then get new 1130 gaskets.