5.0 heads on a 5.8

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Re: 5.0 heads on a 5.8

Post  rmcomprandy on May 23rd 2016, 1:35 pm

plowboy34 wrote:I didn't realize I was gonna start such a conversation with my question as can I drill my own bolt holes or leave it to a machine shop...... Shocked

Anyways not trying to make anyone mad but here are the facts on these heads as I have laid my own eyes to. They are F3ZE, 3 bar, GT heads, a 1/2" bolt will not go through holes and a 7/16" bolt will. To make sure I had correct size bolts I got out my caliper and checked them. I also checked the head bolts the guy gave me when I purchased the heads and they are 7/16". I also set it right on 1/2" and it definitely is to big to fit in holes. Again not trying to anger anyone just the facts on these heads.

Sorry if we used your thread as a sounding board.

I thought your question had been answered. There is no problem with drilling any small block head with .450" bolt holes to the .517" diameter head bolt holes.

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Re: 5.0 heads on a 5.8

Post  dfree383 on May 23rd 2016, 2:42 pm

Lem Evans wrote:
dfree383 wrote:
Lem Evans wrote:Which heads were on the 351W in the 1st generation Lightning F150s?

Regular GT40

So, they would have to be for 1/2" bolts then?

Yes they have the 351w bigger bolts in that application

They also cam on some explorer/mountaineer 5.0's with small bolts to in later years along with the GT40p heads.
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Re: 5.0 heads on a 5.8

Post  plowboy34 on May 23rd 2016, 2:51 pm

no probs rmcomprandy.....I never mind a discussion on things that's how a person learns....I was just surprised this question spawned such a conversation. And yes my question was answered..... Very Happy

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Re: 5.0 heads on a 5.8

Post  gmsmkr on May 23rd 2016, 3:03 pm

We just didn't want the wrong info out from our board to other readers.... and I also stand corrected not all F3ZE casting had the 1/2 bolt hole but all the lightning and cobra R F3ZE casting on the 351W packed vehicles had the 1/2 head bolt Wink
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Re: 5.0 heads on a 5.8

Post  gt350hr on May 23rd 2016, 6:25 pm

gmsmkr wrote:We just didn't want the wrong info out from our board to other readers.... and I also stand corrected not all F3ZE casting had the 1/2 bolt hole but all the lightning and cobra R F3ZE casting on the 351W packed vehicles had the 1/2 head bolt Wink

+1 I went by my own experience with three line heads. I had to use the special bolts on all of them that "I" have owned and ASSumed they were all that way. My apology.

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Re: 5.0 heads on a 5.8

Post  whitefield on May 23rd 2016, 10:04 pm

Plowboy34 I am pretty confident in saying that none of us in this thread and conversation were mad or upset at one another. we all were trying to give you correct information . Life is good ! Very Happy


Last edited by whitefield on May 24th 2016, 9:44 pm; edited 1 time in total
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Re: 5.0 heads on a 5.8

Post  plowboy34 on May 24th 2016, 7:02 pm

Its all good on my end fellas....as whitefield says LIFE IS GOOD especially with JESUS

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