That's me job; sparking comments lol, stitching works well I've stitched gears on machinery and even my trolling motor ratcheted pivot worked great, finding a block is always the best way and should only be paid for upon your approval of no cracks - may take several try's as the 25" seams to be prone to cracking, my molly blocks don't have that problem, but talk about hard to find - try a 281,306,377,413 molly block (30"). I'm still searching for a 281 & a 413 molly block any condition. Cracked cylinders and valve seat to valve seat or even valve seat to water jacket - not impossible to repair "just takes longer" lol. Cheer up push on and you'll find a good block soon, if you haven't already found it. They are out there, Try Mike at AMS (e-bay seller). Charlie Stephenson