Mounting bucket seats

[shifterracer]

Hey guys,
quick question about installing bucket seats. I bought a 68 nova that the previous owner had installed some really cheap ebay special bucket seats. How they installed and mounted these seats leave me wondering if they even care about a person life! I purchased some corbeau seats with wedge seat frames for a 68 nova. As you can see from the pic below, the mounting holes the ebay specials bolted to won't work with the new frame. Is it ok to line the seat up and drill new holes and buy new hardware? If this is ok, how can i seal the old ebay special holes without having a welder?



ebay special seat with mounting attached. One of them is just dangling there with some cheap bolts used to attach it to the seat frame.