I agree with the previous post(LOL) But seriously, The 351W Is built similarly to 289&302 engines but has a taller deck height,larger main journals,Windsor dedicated Intake manifold,oil pan,crankshaft and connecting rods . The 351M is built similarly to the 351C also with a taller deck,larger main journals,429&460 bellhousing pattern,dedicated intake,cranks,rods,etc.... The "M" is for modified as the engine is a modified version of the "Cleveland" engine.
Every day is a holiday if you love your job.
Current projects: 65 Fastback, 68 Coupe Oval Track Racer, 64 Galaxie 500 XL, 54 F-100 Pickup