Quote:
Originally Posted by Neverunning67
I think which to choose depends on the year of the early block. While the early blocks are stronger, I've read alot about the mid-late 70's blocks experiencing core shift, and generally just not being a good block to build upon. I don't know if this has been dispelled or not, but I think it would be something to look into. That being said, the later roller block would be much easier (and cheaper) to go roller with.
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Whether to use an early or late model block is up for debate, but here are a few of my thoughts on the matter: The early blocks from 67 to the early 70's are considered strong, desireable blocks. From 1975 to 1984 the blocks suffered core shift, were prone to cracking, and were generaly uglier castings, and are pretty much agreed on by most builders as the blocks to avoid. I think the later model blocks have been given a bad rap because of this. In late 1984, with the roller blocks, the casting techniques and quality improved dramatically in every respect. The newer blocks ARE thinner, but with better casting techniques, are veiwed by some to be as strong or stronger than the early blocks.The 5.0 has been proven as a reliable platform for high performance engines. Thinner = lighter=faster. It's already a roller. It has the new, improved one-piece rear main seal. Finally, of all the things that can go wrong in an engine, the block is way down the list. You can pretty much count on a failure of the valvetrain, rods, mains, pistons, or bearings over a block problem.
