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#444087 - Thu Aug 21 2008 12:08 PM 250 with integral manifold
jfnar Offline
Shop Shark
Registered: Wed Aug 30 2006 12:00 PM
Posts: 443
Loc: Arkansas
I've done a search and found conflicting info. Hopefully someone can clear this up. I have a 250 with the integral manifold. Can I change the head with an older one that has separate intake manifold? Some posts say yes and some say it can't be done. Has anyone done this? Thanks.
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#444095 - Thu Aug 21 2008 12:36 PM Re: 250 with integral manifold [Re: jfnar]
Lonnie Gallaher Offline
Shop Shark
Registered: Wed Feb 23 2000 12:00 PM
Posts: 838
Loc: San Bernardino, Ca, USA
Reliable sources state that the earlier head will interchange.
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#444108 - Thu Aug 21 2008 12:59 PM Re: 250 with integral manifold [Re: Lonnie Gallaher]
Hotrod Lincoln Online
Extreme Gabster
Registered: Mon Feb 23 2004 12:00 PM
Posts: 12505
Loc: Dellrose, TN
Yes, and it's done all the time. The integral-manifold head is only good as an anchor for a small to medium-sized boat, or maybe a big doorstop.
Jerry
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#444586 - Fri Aug 22 2008 10:43 AM Re: 250 with integral manifold [Re: ]
Joe H Offline
Shop Shark
Registered: Fri Feb 04 2000 12:00 PM
Posts: 3673
Loc: Lee's Summit Mo. 64086
The exhaust on the integral head has two outlets doesn't it? That will be the only difference.

The early heads are all the same so look for any 230,250,292. The real early 194's have a smaller combustion chamber and will bump the compression up to approx. 9 to 1. They are hard to come by but worth a look if you are in a older yard. The 292's use bigger exhaust manifold outlets, 2.5" instead of 2.25", and can be identified by the three bolt outlet. The smaller outlet only uses two bolts.
There is no difference in the main head, so really the first one that looks good should be fine.

You can always have bigger valves put in when getting a valve job, small block Chevy valves go right in and are pretty cheap to buy.

Joe
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