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new project - welding up a cross flow head

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worken2much
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new project - welding up a cross flow head

Post #1 by worken2much » Fri Apr 03, 2009 6:55 pm

I drug home a Ford 400 v8 head the other day. It has nice port and valve sizes. The valves are canted....I'm expecting it won't work with the 300 pushrods very well. I haven't set it on top of a 300 block to look yet. Maybe this weekend.

This would be for a third 300 circle track motor. Just in the planning stages now. An aluminum head would be great but the price is a little steep. So, I'm having a look at welding up a cast iron one.

Someone on here had mentioned welding one up years ago from 289 heads. I have acces to those as well.

I'd very much like to hear any thoughts or comments.

Thank you
Worken2much

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Stubby
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Post #2 by Stubby » Fri Apr 03, 2009 7:03 pm

I don't like the open chamber of the 351m/400 heads. Now if you could find a couple of the nice Aluminum heads that are on the market.
Never squat with yer spurs on.

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Post #3 by American Thunder » Fri Apr 03, 2009 9:17 pm

289 heads wouldnt be very good. The ports and valves are tiny.
1977 530hp 302 Mustang II videos:
Smokeshow at 8000 rpm
0-90 mph speedometer view

1983 4x4 Bronco - '95 300 converted to carb, 5-speed, 3.55 gears and 9" rear.

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Post #4 by 80broncoman » Fri Apr 03, 2009 9:44 pm

The 351M/400 have EXACTLY the same vavle and pushrod angles as the 351 clevland heads.
FTF can tell you this has been done before. But if i recall the valve layout is wrong for placment on a 300. It would require a very custome roller cam.
If you heart is set on it find some damaged aluminum heads that are from the nascar guys. 3 cylinder clevland heads are cheap.
Then dig deeeep in you wallet for the cam and lifters.
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When it come to engines If its .001 loose nobody knows, But if its .001 too tight EVERYBODY KNOWS!!
80 bronco FUV (farm utility vehicle)300 T-18 3.50s EFI head, offy C dual plenum, 500 edel carb, 1.7 roller rockers, Crane 260 cam EFI Exh

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82F100
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Post #5 by 82F100 » Fri Apr 03, 2009 10:03 pm

You might try a set of V-6 heads as the bore spacing is very close to the 300's. Can't remember the size but I remember FTF talking about them and you should be able to pic up a set of used NASCAR heads kinda cheap.
300's make good truck motors....not race motors

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Post #6 by 80broncoman » Fri Apr 03, 2009 10:08 pm

82F100 wrote:You might try a set of V-6 heads as the bore spacing is very close to the 300's. Can't remember the size but I remember FTF talking about them and you should be able to pic up a set of used NASCAR heads kinda cheap.


Yes they have the right valve layout which makes things much simpler to start with.
OAPSE Union Member

Real men don't wear Bowties
When it come to engines If its .001 loose nobody knows, But if its .001 too tight EVERYBODY KNOWS!!
80 bronco FUV (farm utility vehicle)300 T-18 3.50s EFI head, offy C dual plenum, 500 edel carb, 1.7 roller rockers, Crane 260 cam EFI Exh

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worken2much
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Post #7 by worken2much » Sat Apr 04, 2009 9:39 am

Anyone know which V6?

Thanks
Worken2much

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Post #8 by J.R. » Sun Apr 05, 2009 6:01 am

IIRC it's the Ford 4.5L V6 originally made for a NASCAR-threatened ban on V8s. Some NASCAR races used them in the early 90's (530HP?), but then around "95 or '96 NASCAR banned them in favor of the V8s.


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worken2much
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Post #9 by worken2much » Tue Apr 28, 2009 10:43 pm

Um...........sorry for the delayed response but we've been trying to get our vintasge dirt cars ready for the racing season and things haven't gone quite as slick as they could.

Anyways, where would a fella look to find some of these aluminum v6 cast off Nascar heads? Just aren't a whole bunch of Nascar guys out here in good ol' South Dakota.

Any help would be appreciated.

Thank you
Worken2much

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Post #10 by 82F100 » Wed Apr 29, 2009 2:15 am

Workin2much, I remember comin across a site that delt with used Nascar stuff, might try looking on some of the latemodel sites in the south or something like that.
300's make good truck motors....not race motors

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Post #11 by Keefer1 » Wed Apr 29, 2009 7:56 am

The canted valve heads can be done , but....... You will need custom intermediate lifters , two pushrods per valve ....a custom cam.
we used off the shelf trw domed clevaland pistons , but (I think) custom rods to make the piston height right. I sure do wish I had payed better attention , but it was 35 years ago and I was only 16 at the time.

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