[BADGMC]

That should be pretty close. I used an eagle rotating assembly also except mine had dish pistons which put it at about 8.5:1 compression. You should be closer to 10. One thing I would think about is the cam. Big cams in heavy vehicles don't get along and a 286 is pushing it unless you run like 13 to 1 compression to cover it up. Just for an example my truck without the blower ran mid to high 13's with the 274XS comp cam. A friend of mine has a shortbox with an 12 to 1 355 and a comp XE294 and that only runs high 13's. There is also a big drivability difference between the two. Anyways good luck I think it should work out for you.