400 engine

rbohm said:

any small block ford balancer will bolt up to any small block ford engine from the 221 through the 400. the only differences in balancers are crank pulley bolt patterns, timing mark loactions, and balance factors, and the last one only deal with the 81 and later 302/5.0 engines with the 50oz balance factor. all other ford small block engines use the 28oz balance factor.

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Hack said:

400 and 351M are big blocks. The deck is 10.2" and they have a big block bellhousing bolt pattern. Do they still follow the small block rule you listed above?

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rbohm said:

the 351m and the 400 are still small blocks. the heads can be used on a windsor engine to make a clevor. in fact the 351m/400 heads are essentially 351c 2v heads.

and yes they follow the small block rule i listed. and while the bellhousing patterns and the engine mounts are different from the 351c, you can use 351c cams, pistons, water pumps, timing chains, flywheels/flexplates, balancers, distributors(they also interchange with the 429/460 distributor as well), oil pumps.

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Hack said:

Typically people still call the 351M and 400 big blocks due to the engine mounts and the bellhousing bolts. Yes they are part of the 335 series and share some commonality with the Cleveland, but not rotating assemblies, intakes or blocks. You can call them small blocks if you want, but they still bolt to the car and transmission like they are a big block.

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N242 said:

so i can use 351m balancer ?

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