well, i'm not a fan of that one, but getting the old one off is easy. it should just pull out. there should be two prongs sticking into the hood. if that base doesn't cover the holes (i don't think it will), then you'll have to get some filler and paint. good luck.
Thal last one looks like the one i got off ebay, however im planning to use it on the back near the key for the hatch and also it came with another like mine..so Im placing them next to each other or maybe one in front and one in back, gotta pay tributo to old and newer mazda symbols.
-hec
MX-3 w/ curved neck millenia klde, boosted @ 5 psi. /bov and wastegate are good!/ nitto drag radial/ gutted interior/ millenia red top injectors, vortech fmu/aem wideband/ all bolts ons/ Car put together 100% by me. Mechanic? who needs a mechanic? ew.. real men work on their own cars!