There have been a few boss castings that have come out they look really good thus far. Public purchase should be in a few weeks, HP rating is 1200, lifter bores are finished, cylinders need to be honed as they come just under 4.00. Its the same as an R302 except there cooling holes in between the siamese bores and screw in freeze plugs. Same pricing. Remember though, the 400 small block chevy is siamese and never had a cooling issue on the street. I dont understand fords reasoning on offering this block. 1799.00$