Cement filled block

Great rides on this forum, thanks to you all for sharing. I have a question I was hoping one of you might know the answer to. How can a guy remove cement from a block once it is installed? See I have a 1970 T/A challenger, 3rd owner, bought it in 1975 and the original motor was already gone from it when I bought it. I have collected many pieces over the years including the T/A top end and even a T/A block, but the block is concrete filled. I would love to reclaim it for my car, but haven't found anything which has a hope of working. Any ideas would be greatly appreciated.