I have one of these that started out as a frame from a car boot for a fiver. I had some yellow RST forks on it but IMO they didn't go at all. It now has some black Rockshox Judy TTs and looks much better. Don't know if they're period correct but neither is the rest of the bike so not a problem.
On the colour issue, some kids along the canal said it was a girls bike . I don't care 'cos I love it.
If you go sus. forks, you may be want to drop the rise of your stem as the front will be raised for general riding.
Though you'll be able to drop a little as you're not using the canti hanger.