inline 6 heads inter change

are all 144/170/200/250ci cylinder heads interchangeable
i was reading this form and the form said they they would i would really like to no or has someone already done this


heres the form
http://www.mustangmonthly.com/techa...d_six_cylinder_performance_guide/viewall.html

 

if money is no object...go for it. there is a reason why you don't see a lot of them in a Mav/Comet.

i built a pretty throaty 250 back in the day, a lot of people thought it was a 5.0 from the sound.
it was a lot of money to be able to tell people at car shows... ..."it runs great- for a 6 cyl"...or..."it runs about like a stock 302"... for twice the money.

the worlds fastest inline 6 cyl...is still a 6 cyl.
...JMO...

 

In terms of simply bolting to your block, then yes. However there are some differences between these heads and I think alot depends on what year the head was manufactured. Some of the older heads have a smaller diameter log intake than the later models and I believe the combustion chamber sizes may be different as well.

 

i dont have the money but some day........... it would be different me and my dad was talking about fuel injection but i was reading and think tbi would be much more easyer/cheaper by the way my 200 inline is a 76 model with a 4 speed imposter (3speed o/d tranny tag says RUG BP) tied be hide that and i get like 23 mpg i figure tbi would make it more like 26 + added horse power and my boner stock smoker <--(need a rebuild) out run a 400 sb chevy at somernight cruz by half a car link on hole shot which surprized me . that was y i was asking about the heads interchaging because the 250 intake it not made to the head and theres after market intakes

 

All cylinder heads from 144,170,200,250 are interchangeable.

77' and up heads (200,250) are the way to go as they have the largest size valves and intake volume.

 

so a 77 and up will bolt on a to a 76

 

from looking at the fordsix performance handbook, every head from the ford six small block family(144-250) will bolt to the 200/250

The 77' is a good head to build for a straight six, there are two types though, a hex head and flat top head. The flat top will accept milling for multiple carburetors & a 2 or 4 barrel carb. The hex head is not as easily machinable for 3 carb setup and so forth from my understanding.

 

whats the phsical different to look for in the to so if i come acroos one ill no

 

and im losted the intakes unbolt off a 250 head right

 

Nope it's cast with the head. The Aussie 250 head had a removable intake, but it was also on the other side

 

well crap i have a good idea on what to do but no its all blurry

 

They are all interchangeable althought the valve sizes vary and other differences... things that can change compression.. I have a six and went to www.fordsix.com to learn about the differences. Also the head gasket available today is thicker than the original and winds up lowering the compression and loses power... go slow... dont just throw something on there..

 

We need to know the different between a Hex head and a Flat top head ?

 

I don't have any pictures to show you but the hex head is like described, its like a stop sign and is angled on both sides and where the casting numbers are they are flat. The flat head is perfectly rounded without any jagged edges.

If you see them in a picture or up close its easy to see why its hard to mount tri-carbs and so forth to the hex head as its not perfectly shaped.

hope that kind of helps. there may be a picture on fordsix or somewhere

 

Is the hex part just on the intake? or is the whole head a hexagon shape?

I've never even heard about them. Love learning new stuff