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So I just bought a bunch of big blocks and that'll be a discussion for another thread. Amongst them is a '74 HP block that has stamps on the pad that we've all seen before but I want to know what you guys think the "4T" means. We are sure that it doesn't mean truck as I have heard some people say. There's a partial vin on the block and the only other thing I know about it is that the car was built at the Belvidere, IL plant. What model line was being assembled there in '74?