I've changed plans for my blazer, so my 454 has got to go. The numbers off the block are: 3999289 from a 72-78 car or truck 2 bolt main the numbers off the heads are:3909802 from a 66-67 396 or 427 closed chamber oval port the numbers off the intake are: 3883948 from a 66-68 396 or 427 Runs good, and is ready to drop in a go. Comes with 4 core Radiator, brackets, starter, exhaust manifolds, and carb. Also has a flexplate on it. Allan(mountainexplorer) has driven it and can vouch for it running strong. Would like to get $750. Can ship at buyers expense, will pallet it and wrap it free.