was "what head number", now Head Questions

[Zorm]

looking at a 200 head from a 81 Ford Fairmont Futura, what is the number I am looking for and where would it be located?. If this is the right head, it is supposed to have new springs. I was thinking of taking it to my machine shop and have him mill the carb mount flat so I can direct bolt the 2bbl motorcraft. What else should I do to the head? have it milled to get it back to the 52cc chamber?
This will be going on a 66 Mustang 200 block, will I need to also replace my exhaust manifold? Would the PS pump from the ssame car with its brackets bolt up to the 66 block?

 

[rocklord]

Look on top of the intake log, there should be a casting number starting with D7, D8, E0, or E1.

The D7 and D8 heads should have an intake log of 1345cc.
The E0 and E1 heads should have a 1420cc intake log.

These are the heads you want to look for.

Check out the info on the head castings here: http://www.classicinlines.com/SmallSixS ... #SSgeneral

Hope this helps.

 

[Zorm]

ok, looking at that list, the head stats, the ADV HP, on my 66 engine its 120, on the 81 head its 99, what do I need to do to the 81 head to get it to the 120 ADV HP? Is it covered in the handbook?

thanks

 

[JackFish]

The different heads will make very little difference in power.
Larger volume is better, they say.
The 120hp rating was from an earlier rating system, I think it was flywheel hp, whereas the later engines were measured at the rear wheel.
There may be more seat of the pants power on an earlier engine and a few more real horsepower but that would be because the later engines were encumbered with emissions crap, and de-tuned for economy. They also had a cam that was retarded 4°.

 

[rocklord]

ok, looking at that list, the head stats, the ADV HP, on my 66 engine its 120, on the 81 head its 99, what do I need to do to the 81 head to get it to the 120 ADV HP? Is it covered in the handbook?

thanks

The 1966 HP is gross, 1981 HP is net. Rule of thumb 1.4 Gross HP = 1 Net HP. 120 Gross HP = 86 Net HP. The 81 head may have larger combustion chambers, so it will have to be milled to get the compression up. Also the head gasket of today is thicker than the steel one used in 1966, so the head will have to be milled for the difference in thickness to maintain CR.

 

[CZLN6]

Howdy Zorm:

Q- "what do I need to do to the 81 head to get it to the 120 ADV HP?"

A- Forget about advertized HP. Yes, there are two differences between '66 and '81. 1st is the difference between Gross and Net ratings, which Rocklord already explained. 2nd is the difference in Compression ratio; '66- 9.2:1 CR, '81- 8:1. So it will be necessary for you to maintain a 9.2:1 CR to be somewhat equal. .050" for the chamber volumes and another .025" for the differences in old and new head gaskets.

Q- "Is it covered in the handbook?"

A- Yes.

Q- "This will be going on a 66 Mustang 200 block, will I need to also replace my exhaust manifold?"

A- No, the '66 exhaust manifold actually has some advantages over the '81 manifold. I'd clean up the '66 and use it, if it doesn't have any cracks.

Q- "Would the PS pump from the same car with its brackets bolt up to the 66 block?"

A- Not likely. The '66 will have a short pulley system. The '81 will have a long pulley system.

Adios, David

 

[Zorm]

Ok, cool, thanks for all the info. So with all that said, call me stupid but what gaines would I see with the newer head. I know the log is bigger and the valve size is bigger thus causing the engine to "breathe" better. Its easier to machine the log for a direct mounting of the 2100 I have, any other advantages?

 

[Zorm]

ok, another question, did all 200s (66 era) come with hyd lifters? After I get .075 machined off the head just want to make sure I will not have any other issues

 

[bubba22349]

what gaines would I see with the newer head. I know the log is bigger and the valve size is bigger thus causing the engine to "breathe" better. Its easier to machine the log for a direct mounting of the 2100 I have, any other advantages?

Those are significant improvements and you will feel the difference. If you want to add more than also pocket port the valve bowls in the head and do a 3 angle valve job.

After I get .075 machined off the head just want to make sure I will not have any other issues

There should be no issues most of this differance is covered with the thicker head gasket we have today.

 

[Zorm]

Places like this are awsome! I'm also on the IFSJA.org page, old wagoneer size jeeps and pickups, and on the Fordification.com page, that one is for 67-72 Ford pickups. I love my old cars/trucks/jeeps.

thanks for all the info folks

 

[chad]

I love my old
& I love yer ol p/u = "Highboy" if 4x4 (kinda like the '73 - 9 looks even more tho).
Good luck, stick around...
8)

 

[Zorm]

Chad, sorry not a high boy, its a F250 camper special. Been in my family since it was a year old. Had a cab over camper in the back when we bought it. Seen every national park in the country whe I was small. That truck has at least a million miles on her and still purrs like a kitten, of course, she has had 3 engines and 4 transmissions ;-)

 

[chad]

HiYa! Zorm

>if 4X4
OK, guess it's not. Made a trailer from one like yours (took the smashed up cab off, bent the frame rails in, mounted a loop 4 my pintle hitch, etc). Wouldn't do that to a highboy. (It dwarfs my bronk).

>3 engines
bet a 300 woulda lasted - never put em in a camper special tho.. What did it come with?

 

[Zorm]

started with a 360, then a 390, now back to a 360 V-8. Need to finish the mustang project, tie up the jeep project, then move on to the restore of the old family pick-up, this + all the Honey do stuff, never enough time, wish it was cooler