Editing Ford 335 engine (section)

===351M===
{| class=wikitable align=right
|+''Engine dimensions''<ref name="Cleveland"/>
|-
! !!351C||400||351M
|-
!Nominal main bearing size
|2.750&nbsp;in (69.8&nbsp;mm)||3.000&nbsp;in (76.2&nbsp;mm)||3.000&nbsp;in (76.2&nbsp;mm)
|-
!Rod length
|5.78&nbsp;in (146.8&nbsp;mm)||6.58&nbsp;in (167.1&nbsp;mm)||6.58&nbsp;in (167.1&nbsp;mm)
|-
!Rod-to-Stroke Ratio
|1.65:1||1.65:1||1.88:1
|-
!Deck height
|9.206&nbsp;in (233.8&nbsp;mm)||10.297&nbsp;in (261.5&nbsp;mm)||10.297&nbsp;in (261.5&nbsp;mm)
|}

When the 351 Cleveland was discontinued after the 1974 model year, Ford needed another engine in that size range, since production of the 351 Windsor was not sufficient. Ford took the 400 engine's tall-deck block and installed a crankshaft with a shorter {{cvt|3.5|in|0}} stroke to produce a {{convert|351|cuin|L|1}} engine. This crankshaft was not the same as a 351C, in that it used the larger {{cvt|3.0|in|0}} main bearing journals of the 400 V8.<ref name="V-8 Data Book"/> To compensate for the shorter stroke the pistons for the 351M have a taller compression height, so that it could use the same connecting rods as the 400. The result of the 351M using the longer 400 connecting rod was a higher connecting rod-to-stroke ratio of 1.88:1 than the 351C and 400's of 1.65:1.<ref name="Cleveland"/> Other than pistons and crankshaft the 351M shared all of its major components with the 400, and it also used the large [[Ford 385 engine|385 Series]] style bellhousing. The 351M was only ever equipped with a 2-barrel carburetor and open chamber small port 2V cylinder heads.<ref name="Bubba"/>

351M production began for the 1975 model year and blocks were cast in the Michigan Casting Center or the Cleveland Foundry. The 351M was the last pushrod V8 block designed by Ford<ref>{{cite web|url=http://400ford.info|title=Geoff Infield's Ford V8 page|access-date=25 July 2006|archive-url=https://web.archive.org/web/20060218205126/http://www.geocities.com/infieldg/v8main.html|archive-date=18 February 2006}}</ref> until the introduction of the 7.3-liter "Godzilla" engine for the Super Duty trucks in model year 2020.<ref>{{cite news |url=http://fordauthority.com/2019/08/ford-super-duty-7-3l-godzilla-v8-compares-heavy-duty-v8-engines-gm-ram/ |title=Ford Super Duty 7.3L Godzilla V8 vs. GM, Ram V8 Engines |first=Jonathan |last=Lopez |work=Ford Authority |location=US |date=8 August 2019 |access-date=5 October 2019}}</ref>