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Old 02-14-2005, 22:55   #1 (permalink)
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Pre Xflow: 200ci head onto 250ci block?

Okay, so my old 200ci engine was a bit on the ****ed side, so I upgraded it to a 250ci (should be same year engines).... But.....
The 250 has a few bolts broken off in the exhaust manifold (head), so I'm thinking of fixing up the 200 head, drilling out the bolts broken in that too and replacing them with studs, or tapping the holes again (for slighty bigger bolts).
So, can a 200 head go on to a 250 block?

Still ironing out the kinks in the 250, needs new sparkies, the ign system is done though, the carby needs replacing, or cleaning (got one thats good)... And that should be it, and since I'm planing to swap the heads around while fixing both, the head gaskets gonna get replaced, which it probably needs to be...

Opinions?
Looking forward to giving it balls once its running properly...
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Old 02-15-2005, 02:00   #2 (permalink)
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Re: Pre Xflow: 200ci head onto 250ci block?

IM pretty much sure the chamber sizes are the same..As long as both blocks are pre-crossflow but not to early there wont be a problem, you carnt put pre cross flow head on cros flow block
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Old 02-15-2005, 20:45   #3 (permalink)
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Re: Pre Xflow: 200ci head onto 250ci block?

Thet are both pre xflow, and after another look, it seems they have the same casting numbers...
My life is less stressful once again.
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Old 02-15-2005, 23:39   #4 (permalink)
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Re: Pre Xflow: 200ci head onto 250ci block?

Okay, heres something I'm quite curious about....

The bellhouse of the 200's gearbox (box is supposed to be an all-syncro heavyduty 3 on the tree), fits to the 250... But...
Does the gearbox input shaft lineup properly with the clutch/flywheel of the 250 with the 200 bellhouse?

Important, because it would explain the problem I'm having with the engine running fine in neural, but pop it into gear, and around 2000-4000rpm, and it shakes a little and has acts kindof like its starved for fuel or the mix is choking it...

I'm refering to http://fordsix.com/200-250.htm for info on the bellhousing, but because the 250 bolted right up, I'm in doubt...
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Old 04-30-2005, 03:39   #5 (permalink)
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Re: Pre Xflow: 200ci head onto 250ci block?

Hi
all the difference between 200 ci and 250 ci is the rods and crank. The rest is predominently the same. All parts are interchangable. The 200 is just a de-stroked 250. :)
Hope this helps.
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