J Heads ported

I have a set of j heads with adjustable rockers. These heads have port work done to them. I don't have any flow numbers. Picked them up with a project car years ago. They've never been on a running car since they've been rebuilt. I'm assuming they are done right seeing how the motor they came off was stamped " ram chargers" and yes I got the car from Michigan. That's all I know about the heads. Asking $ 750.00