The FelPro part number for the 64-65 273 is MS 9935. Just google it from time to time, check Rock auto also once in a while. I do have a set somewhere, but it will take me a bit to find it.
Thanks. The 1243 seems to be the best available now, made for the smaller 273/318 ports. Rock Auto doesn't even list the MS 9935 anymore. If you did come across yours I would be interested. I haven't purchased the 1243 yet. Thanks.