Thanks guys, I need to do better searching.
I'm not sure if I'm going to destroy my head at all, but it is already in my garage and I don't know anyone who would pay for that. I know one '69 head for sale here in Finland, but i think its better to destroy this small log intake/head than something that could work.
Those crossflow heads are still looking good for me, but it looks like I can't get one for now, so i'll be looking those later. IF I'll mill my intake, I think I'll do new one similar to crossflow EFI intake.