It's a 69. Should be a good choice for a stroker. Keep in mind that the 69-early 70 351W blocks were a tad bit shorter than the later model ones. This will affect piston clearance and pushrod length to some degree. It's not a big deal, but be sure you mention you're using a 69 block when shopping for stroker parts. If the parts guys know anything about what they're doing they'll know what's required.