I have 3 heads to choose from for my upcoming 292 build. I can't seem to find any info on these casting numbers.

3847990-this is the head that came on the 292 I have.

331184-this head came off a Mercruiser 250.

3895080-this is the head I have been running on a 230.

I'm just wondering if any of these are anything other than run-of-the-mill. All are in good shape, as far as I know.

Thanks.