I have this new 4.6 alum. block for sale. I got it to do a 5.0 big bore motor but never did so now I'll get rid of the block. It has some extra webbing in the valley over the earlier blocks but am not sure if its a windsor or teskid block. It has the casting # RFXE-6015 on the side. Its UPS able since it weighs like 75#s or so. Id like to get $450 for it. Im in central AR as well. Thanks!