I asked Gene last week about the forks, here was his reply (Spicer are great people):

Hi Naz,
thanks for the email. The only threaded forks I have are yellow that are drilled for brake. I think there are eyelets on fork ends too. I would have to know the head tube length of your frame to see if I have one that works (just head tube and not cups too) I just have one ore two I think.

I have a few chrome 1" threadless in 42 rake and some 1" black threadless in 38 rake, neither are drilled.

I have tried to thread and it is about impossible to get good depth of threads and straight using hand dies.

thanks,
gene