400 engine

[N242]

hi
i have ford 400 engine 77 frome f100
and i need a new balancer .
i read that 351M balancer is different from the 400 engine .
but when i look in summit catalog i see that they have the same part no

Pioneer Automotive DA3512 - Pioneer Balancers - Application - SummitRacing.com

i wanted to buy in half price in ebay anew one but the seller told me that it not fit

http://cgi.ebay.com/ebaymotors/Ford-Mercury-New-5-8L-351M-Harmonic-Balancer-77-79-/200615423395

Can someone explain this to me?

 

[Hack]

Maybe some people here know the answer to this. I don't. I'd recommend the FTE (Ford Truck Enthusiast) forums for this question as the 400 and 351M never came in Mustangs. The FTE forums are really great for Ford pickup info.

I would be surprised if they use different balancers. It doesn't make sense to me - but Ford did some things that don't make sense to me.

 

[rbohm]

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.

 

[Hack]

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.

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?

 

[rbohm]

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?

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.

 

[Hack]

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.

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.

 

[rbohm]

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.

you speak the truth, even ford called them small blocks. and there were some early 400s that did in fact use the small block bell housing bolt pattern.

 

[N242]

so i can use 351m balancer ?

 

[rbohm]

so i can use 351m balancer ?

yep.