anyone have tips on how to mount it on canon bodies? the screw mount at the end is either 40mm or 42mm

Thanks for the responses. Ill try to get the opinion of a professional lens cleaner.

Here's an image of the lens:

Hello to Everyone!

I've just received an old Pentax lens from a friend. It's an Asahi Pentax 1000mm. It is a Monster Giant Lens! Weighs quite a lot. It's about 70 cm. long and it's screw type. Diameter is 14.5cm. On the front of the lens, it says Super Multi Coated Takumar 1:8/1000 Asahi Opt. Co. Japan.

Now the problem:

It has fungus. Can anyone tell me how to clean it up and what solution to clean it with? I have never done any cleaning on lenses but I have opened up fixed a lot of electronics before.

Additional Question:

Is there a way to mount this lens on a Canon EOS body? Are there ring adaptors available? Like ones where you can mount nikon lenses to canon bodies losing the AF function. I'm not really planning to use it for anything. It would just be neat to restore it

Ill try to post a picture of the lens soon