Well, I looked at the supposed 428 two towns away. It isn't a 428, it was a 427 with two 4 barrels...so I passed. I can't afford the gas mileage for that.....
Just kidding.
It's probably a 390 or 352. Cast in the back was 352. No C, no A. No counter weight. The date code started with a 4. Either 64 or 74, both are years the 428 was not available. The guy still believed it was a 428. Luckily it wasn't far to drive to get there. Plus I got to take my 69 Cougar for a ride. It was a nice trip.
So I am still looking for a 428.
thanks,
Mark