Will 351 Cleveland heads fit on a 351M?
Hi dlone, 4V Cleveland heads will fit on a 351M (Midland) engine, but the ports are very much larger than the 2V ports in the 351M heads.
Are 351C and 351M heads the same?
Because the 351C and 351M/400M are from the same 335 engine family, many things are interchangeable. Heads are interchangeable with Clevelands so any stock Ford casting or aftermarket aluminum 351C head will work on a 351M/400M.
How can you tell a 351M from a 351C?
The easiest way to tell a 351C from the taller-block351M/400 cousins is to look at where the distributor bolts down. If your intake manifold/block gasket is even with the distributor flange, you have a 351 Cleveland. If the intake/block joint is about an inch higher than the distributor flange, you have a 351M/400.
What does the M stand for in Ford 351M?
Modified
Some claim the “M” stands for “Modified” – being modified from a 400-V8 with a shortened stroke – though others claim that the “M” refers to the Michigan Casting Center, where the 351M began production.
What heads will fit 351C?
The 351C 2V heads and M-block heads use the same size valves (2.04/1.66). The M-block head can be machined to use 351C 4V valves (2.19/1.71). The 351C and 400 pistons have the same compression height (dimension from wrist pin to top of piston), but the M-block wrist pin is slightly larger than the 351C wrist pin.
Will 302 headers fit a 351M?
Although the header flanges will fit both engines (both engines use the same heads) the headers for the 289/302 will not fit the body in the same way because the 351W is taller and wider than the 289/302. You will need to swap the headers for a pair specifically for the 351W engine.
How much power does a 351 Cleveland have?
Horsepower. The 351 was available as a two-barrel which was a basic engine and a four-barrel, or performance, engine. The two-barrel was rated at 240 horsepower while the four-barrel was rated at 285 horsepower.
How much HP does a 351M have?
Factory Power Ratings
| Model Year | Engine | Horsepower @ RPM (SAE net, except ’71) |
|---|---|---|
| 1978 | 351M (car/truck) | 152 @ 3400 / 156 @ 4000 |
| 1978 | 400 (car/truck) | 160 @ 3800 / 158 @ 3800 |
| 1979 | 351M (car/truck) | 151 @ 3400 / 156 @ 4000 |
| 1979 | 400 (car/truck) | 159 @ 3800 / 159 @ 3800 |
How much horsepower can a 351M make?
The 351M was produced between 1974 and 1979 in passcars, while the high-torque, low-rpm 400 prodded large cars and pickups through 1981. When new, these slugs never produced more than 173 hp. Regardless, “M”-series engines are plentiful, cheap, and usually show little cylinder wear, even after 150,000 miles.
Can you put 302c heads on a 351C?
Thanks! They’ll bolt right on a 351C, & you need an intake OEM 2 bl or aftermarket 4 bl intake designed for the 2V heads, the 4 bl intake for the 4V heads won’t work.
Is a 351M A big block?
The 351C used the “Small Block” bellhousing bolt pattern. The 351M/400 used the “Big Block” bellhousing bolt pattern.