I'm pretty sure they don't check the VIN, otherwise there would only be two or so cars in the Hemi shootouts if they needed to be an original LO23 or BO29. I think you would have pretty much the same combo I am running, just that you have a hardtop and mine is a sedan. I don't think there was a large difference in shipping weights. I guess I was wrong, my 270 sedan is at 13.47, the 270 hardtop is 13.60, and the Dart GT hardtop is at 14.02. You can run two classes lower than my car. Natural M/S car.

I'm getting different opinions on the 920 and 302 heads. I guess I'll have to get some 302s for flow testing. I think the chambers are similar. I've been told the 302s have a bigger port. I have two of the LD4Bs with the Chrysler part number on them.