Cleveland parts on a M motor

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Cleveland parts on a M motor

Post  gmsmkr on August 18th 2015, 1:17 pm

Ok guys I know this is a odd question but will 351c heads and cam work with a 351m also why is there no aftermarket for the modified motors only pistons I'm finding are for a 400m....

The old modified motors have alot of potential I remember as a kid a old man had one in a old ford car and it would run for its time. ( or so I thought ) as a kid alot of stuff is fast...
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Re: Cleveland parts on a M motor

Post  crittersf1 on August 18th 2015, 1:40 pm

The 400 was never an "M". The 351 was a "M"odified 400. As of late I've been seeing a lot of aftermarket support for the 335's.
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Re: Cleveland parts on a M motor

Post  rmcomprandy on August 18th 2015, 5:23 pm

Cleveland heads do fit a "Modified" block and CHI makes some good intakes.

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Re: Cleveland parts on a M motor

Post  68formalGT on August 18th 2015, 6:02 pm

Intakes fit with adapter plates.
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Re: Cleveland parts on a M motor

Post  gmsmkr on August 18th 2015, 6:34 pm

Cool thanks guys
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Re: Cleveland parts on a M motor

Post  supervel45 on August 18th 2015, 7:02 pm

Check with TM Meyers, he has all kinds of gooddies for the M's

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Re: Cleveland parts on a M motor

Post  rmcomprandy on August 18th 2015, 7:22 pm

68formalGT wrote:Intakes fit with adapter plates.

NO ... the Cylinder Head Innovations C400 intakes fit without adapters. You need to call them for the 10.3" deck manifolds. $700.00 is out of most people's ballpark for an intake manifold but, not Engine Masters Contestants.

But, you can use adapters to fit other Cleveland intakes; including some others of theirs.

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Re: Cleveland parts on a M motor

Post  68formalGT on August 18th 2015, 8:13 pm

rmcomprandy wrote:
68formalGT wrote:Intakes fit with adapter plates.

NO ... the Cylinder Head Innovations C400 intakes fit without adapters. You need to call them for the 10.3" deck manifolds. $700.00 is out of most people's ballpark for an intake manifold but, not Engine Masters Contestants.

But, you can use adapters to fit other Cleveland intakes; including some others of theirs.

Yea, that's a little pricy. My Nephew runs a 400 in his Bronco and has Cleveland 4v small chamber heads with a Torker intake on the Price Motorsports adapters.
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Re: Cleveland parts on a M motor

Post  FalconEh on August 18th 2015, 9:04 pm

gmsmkr wrote:Ok guys I know this is a odd question but will 351c heads and cam work with a 351m  also why is there no aftermarket for the modified motors only pistons I'm finding are for a 400m....

The old modified motors have alot of potential I remember as a kid a old man had one in a old ford car and it would run for its time. ( or so I thought ) as a kid alot of stuff is fast...


Yes, the heads, & CAM work (aftermarket intake / or spacers required), as for the pistons the 351M is a de-stroked 400 (3.5 stroke) the pistons are the same and the 400 and the 351M have the same bore and CH as the Cleveland however they use a larger wrist pin which could be bushed to use a Cleveland piston for more choices. Plus all of your BBF transmissions bolt right up Smile
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Re: Cleveland parts on a M motor

Post  supervel45 on August 18th 2015, 9:20 pm

^^^^^^^^In other words use a common 351 Cleveland piston with bushed rods to build a 408M. Smile

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Re: Cleveland parts on a M motor

Post  cool40 on August 18th 2015, 9:29 pm

It'll love the bottle..... afro
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Re: Cleveland parts on a M motor

Post  supervel45 on August 18th 2015, 10:22 pm

http://www.ausfordparts.com/ausheads.html You used to be able to get these straight out the SVO catalog in the 80's.

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Re: Cleveland parts on a M motor

Post  gmsmkr on August 18th 2015, 10:44 pm

This build is limited to 355 ci a cam lift limit of 650 and has to be iron headed


Last edited by gmsmkr on August 18th 2015, 10:58 pm; edited 1 time in total
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Re: Cleveland parts on a M motor

Post  supervel45 on August 18th 2015, 10:48 pm

Whats @50?

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Re: Cleveland parts on a M motor

Post  gmsmkr on August 18th 2015, 10:58 pm

supervel45 wrote:Whats @50?

Woops my mind was off in duration land.... fixed it
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Re: Cleveland parts on a M motor

Post  FalconEh on August 18th 2015, 11:01 pm

Not a problem, find a block that will clean up at .020 over, it sounds like a NA deal so get some tight early Cleve iron heads(69-71 yes I said 69), big pop up Clev pistons, bush the rods, and don't be shy on the carb (easy 850) run all the cam they allow, run as much timing as you can(45 ok NA), and eliminate all the weight they allow, up the oil pump pressure too 10/1000 old school should do it,it will pull hard on the top end with the right combo.
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Re: Cleveland parts on a M motor

Post  supervel45 on August 18th 2015, 11:07 pm

The Cleveland pistons will work with a 4.0" stroke with "M" block not so much with a 3.5 stroke in that block though.

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Re: Cleveland parts on a M motor

Post  supervel45 on August 18th 2015, 11:15 pm


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Re: Cleveland parts on a M motor

Post  FalconEh on August 18th 2015, 11:26 pm

Just because the 351M has a compression height in the 1.9's as opposed to the 1.65 range does not mean it will not work, it will be lower compression with the 1.65 same block.
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Re: Cleveland parts on a M motor

Post  supervel45 on August 18th 2015, 11:37 pm

Maybe. It seems like even with a popup and a closed chamber, compression would still be pretty low? If you could get a little longer rod to fit it would be nice. They make the 351M's very hard to do much with.

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Re: Cleveland parts on a M motor

Post  supervel45 on August 18th 2015, 11:54 pm

gmsmkr wrote:This build is limited to 355 ci a cam lift limit of 650 and has to be iron headed
Personally from just the limited info you gave, I think you would come out ahead with a 351 Cleveland 4V closed chamber build in the long run. I would not totally rule out the closed chamber 2v Aussie heads on the Cleveland either depending on the rules.

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Re: Cleveland parts on a M motor

Post  whatbumper on August 19th 2015, 1:03 am

I would build an 2v aussie headed 3.5 stroke deal with whatever needs to be done to the cylinders to clean the bore. Intake can be lot's of things like mentioned above. We did one with price adaptor plates in the early 2000's. We always used cleveland pistons and adjusted rods to match. Cam will be tough because the motor will like RPM but the oiling system won't. LOL

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Re: Cleveland parts on a M motor

Post  cool40 on August 19th 2015, 1:08 am

355" I'd just use a "W" instead of a "m"... Laughing
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Re: Cleveland parts on a M motor

Post  supervel45 on August 19th 2015, 1:13 am

Between the weak factory rods, 3" mains, oiling problems, limited shelf pistons, and intake limitations, I don't think it makes any cost effective sense to build a race high RPM 351M.

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Re: Cleveland parts on a M motor

Post  rmcomprandy on August 19th 2015, 11:18 am

How much money you have to spend will decide everything.
Instead of altering a bunch of stuff and costing time and money just get a custom piston made.
In the long term it will be the least costly.
Bush the 6.580" rod for a .927" pin if you want them full floating.

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