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Discussion Starter #1
I have a 85 5.0 Block with head pistons and basicly all together no top manifold but my question is is there any difference in the block compared to a 89 or 90


the 85 block was also carbed
 

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Pretty much the same block.
 

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Discussion Starter #5

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Discussion Starter #6
any difference in the block at all,like strength or anything?
 

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Ford quit using forged pistons around 90 or 91 in the 5.0. I can't spell the new alloy they switched to but they are not as strong. Your in luck, yours are forged.
 

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Discussion Starter #8
Ford quit using forged pistons around 90 or 91 in the 5.0. I can't spell the new alloy they switched to but they are not as strong. Your in luck, yours are forged.

is that pretty much the ony difference?
even tho it was a carbed engine can i swap my manifold and go or do i need to change anything else?
 

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You can use all the EFI stuff if you want. Thats part of us saying "The Block Is The Same"!!!
 

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Discussion Starter #10
You can use all the EFI stuff if you want. Thats part of us saying "The Block Is The Same"!!!
just making sure if i had to change the cam or anything.
but ill probably just build a motor i want out of it.
 
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Ford quit using forged pistons around 90 or 91 in the 5.0. I can't spell the new alloy they switched to but they are not as strong. Your in luck, yours are forged.

the last year for forged piston was 92

93 first year for hypereutectic pistons
 

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'86+ blocks have semi-siamese bores
'85 and earlier blocks do not

So '86+ blocks are a little heavier and a little stronger because they have a little more iron (between the cylinders).

Blocks changed again in '91 and are from a Thunderbird (F1SE) .

Hypereutectic pistons started late in the '92 model year.
 

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Discussion Starter #13
'86+ blocks have semi-siamese bores
'85 and earlier blocks do not

So '86+ blocks are a little heavier and a little stronger because they have a little more iron (between the cylinders).

Blocks changed again in '91 and are from a Thunderbird (F1SE) .

Hypereutectic pistons started late in the '92 model year.
is it worth building? or do you think i should sell it?
i also wanted to know are the heads the same as the 1990 HO?
 

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Heads are pretty much the same, after the debacle of the 1986 closed chamber heads, they went back to the open chamber design 1985 had.

It's worth building. It'll accept a roller cam too.
 

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Discussion Starter #15
Heads are pretty much the same, after the debacle of the 1986 closed chamber heads, they went back to the open chamber design 1985 had.

It's worth building. It'll accept a roller cam too.
awesome,ill build it and see what i can do.
is it good o bore it out to a 306?
 
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