Hate to say this, but there's no reason why your links (or another set that's not the right length - your links may be easy to sell, lots more people looking for SBC than other V8) can't just be widening by welding a strip of flat stock in-between the ends. Saw or grind them in the center to insure that the locating buttons don't pass across the cut. Use a jig to make sure they're parallel. The weld can overlay the cut ends, but should present to the cover side to prevent interference with the block.
