I found real nice barely used 600 16 stones blackwall last week with tubes for 4 bucks each.... they ended up being farm use.... 20 mph top speed careful out there..
If they are coker's I can't get one year out of them before they are so out of round you can't keep the front wheels on the ground. althought Linder now has a tire shaver unfortunatley my wheels won't fit on it.
The best way to find two tires is to go in with a friend at a swap meet and buy four. Restorers, it seems, are always selling four 600x16s because the white isn't white enough for them. What a hoot!,..... please join me at the next swap. I'll go halves with you.