The local paper I get out of Butler, PA post an old photo everyday titled "Time Capsule". The photo they had the other day was from the 1974 Three Rivers Vans truck-in at the Butler Fairgrounds. I was there with my 65 Chevy. It says there was 1500 vans at the fairgrounds, but I think the total was much higher, the place was wall-to-wall vans. There was a parade through downtown butler with 714 vans in it. Not sure but this event may of been called Van Fair East. My old browser won't let me upload pics.