Nov 18, 2008 · Today, we can build a 351M/400 with a 4.75" stroker crank and a 4.060 bore to displace 492ci. This is what's feasible. What's economical has mostly to do with aftermarket …

Jun 7, 2022 · The 351M has a displacement of 3.8 liters while the 400 has a displacement of 4 liters. Both produce approximately 300 horsepower, but the 351M produces about 150 …

Jun 29, 2015 · 351M/400 engine supports and rubber motor mounts are different than 360/390. I'm not a fan of 351M/400's as they were very prone to cracking cylinder heads. We would love …

May 27, 2003 · The 351M/400 block is an "overgrown" Cleveland with bigger mains and an extra inch of deck height. BTW the 351W is an "overgrown" 302. The 400 was first introduced by …

Mar 30, 2003 · 351M vs. 400M the only real way to tell the difference is to check the part num on the chrankshaft. the harmonic balencer is thicker on a 400. a 1k on the crank is a 351m. the …

There are 351M's and there are 400's, but no 400M. A little background: Ford didn't put a letter on their engines, like 351C, unless there was more than one engine with the same cubic inch …

May 12, 2008 · one way to see the difference between a 351C and a 400 or 351M is the thermostat housing sits up about a 1/2 inch from top of the block on 351M/400 and on 351C …

Jun 24, 2007 · The 351c, 351m, and 400 engines are all part of the 335 series engine family. What distinguishes the 351m/400 blocks from the 351c is they have 1.1" taller decks and the …

Feb 6, 2011 · Since the crankshaft is the main component that determines whether the engine is a 351M or a 400, the only reliable way to identify an M-block engine as either a 351M or a 400 is …

Oct 29, 2006 · The 351M/400 were poor performers in stock trim, with restrictive intakes and poor cam timing, but there is no reason that can't be fixed with a rebuild. The stock 2 barrel heads …