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Old 06-10-2004, 18:26   #1 (permalink)
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351 Boss

One of my mates told me that you could make a 351 BOSS by taking a 351C and a 351W and then mixn' and match'n different pieces of em..... i want to know what he was talking bout and if this was possible.
if so does anyone know which bits u gotta mix?
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Old 06-10-2004, 18:27   #2 (permalink)
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Re: 351 Boss

Wtf?
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Old 06-10-2004, 18:35   #3 (permalink)
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Re: 351 Boss

that's what i thought Peuty
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Old 06-10-2004, 18:43   #4 (permalink)
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Re: 351 Boss

a 351 Boss is a Windsor with Clevo heads. it's more than a mix n' match job though...
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Old 06-10-2004, 18:43   #5 (permalink)
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Re: 351 Boss

Yes your right the BOSS 302 Mustang used the 302w block and Clevo heads (I think 4v but im not 100%) and a different manifold to fit. I think rods and pistons were also specific to the BOSS motor. A 351w block can also be used. but IMO your better to use aftermarket alloy heads nowdays, than to try to get the specific manifold to fit.
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Old 06-10-2004, 19:03   #6 (permalink)
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Re: 351 Boss

Were you smokin at the time your mate told you this?
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Old 06-11-2004, 06:21   #7 (permalink)
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Re: 351 Boss

I wasn't smoking...... but my mate (who worked at the servo station i work at) drives a torana and is a big holden fan.... go figure
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Old 06-11-2004, 06:48   #8 (permalink)
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Re: 351 Boss

Nah, ya weren't smoking! Boss motor was a Windsor block with modified Cleveland heads and a unique manifold. I believe crank and rods were unchanged. The heads had mods to the water passages, and a few other areas - a search should give details as it would be really well documented.
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Old 06-11-2004, 07:09   #9 (permalink)
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Re: 351 Boss

The original Boss351 released in 71 Mustang was a performance version of a Cleveland engine - similar to 4 bolt GTHO spec

You can make the equivalent of a Boss 302 for a 351W by using a 351W bottom end and Cleveland 4V heads. They are generally known as Clevors and you require a range of custom parts, such as the inlet manifolds

As anyone with a 4V Cleveland will tell you - they have nothing below 2500rpm and then they take off like a scalded cat - same with Clevor

You can get a better and cheaper combination with a 351W and alloy heads or 351C and alloy 3V head

Here's a recommendation from someone who built one

there's a tonne more to it than just bolting them on. Nevermind the custom intake, you need special head gaskets, pushrod's, rocker's, exhaust manifolds, etc etc etc... My advice?

Buy a set of windsor heads. You'll be alot happier in the long run
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