300 question And core support
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Tuned
Joined: Aug 2019
Posts: 253
Likes: 4
300 question And core support
So I went to my local salvage yard today and looked at a 300 straight six but I couldn’t tell what year it is but I know it’s not fuel injected but it’s buried under a shelf and in front of that shelf is a forklift and a vw bug does anyone know what years of 300 motor will work with my truck do they all use the same motor mounts and bell housing from 1965-1984ish I think and I’d like to use the 4spd that’s in my truck it’s a 1965 f100 and my other question is I’m looking at buying a core support for my 66 also but all I can find are the 65 2wd ones I know they will work does anyone know what I will need to modify it’s something with the inner fenders if I remember right
FTE Legend
Joined: Nov 2015
Posts: 30,906
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From: Angier, NC
As far as I know all 300's are the same up to the end. The EFI blocks don't have the fuel pump opening machined but I hear the cam has the lobe for the pump arm.
All the old manifolds will bolt onto a EFI head. What some do (me) is use the stock log intake manifold and the EFI exh. manifolds as they flow a litter better than the log exh manifold.
They say bolting on a 240 head will raise the compression half a point.
You did not say what motor & model transmission you have now.
Your motor mounts on either side of the motor or at the front as I don't know the older trucks?
I came from the 80-86 area ad the frame mounts are different for the 300 six than the 302 / 351w and again for the 460 motors so 3 different sets of frame mounts.
If I am wrong I am sure someone will speak up.
Dave ----
All the old manifolds will bolt onto a EFI head. What some do (me) is use the stock log intake manifold and the EFI exh. manifolds as they flow a litter better than the log exh manifold.
They say bolting on a 240 head will raise the compression half a point.
You did not say what motor & model transmission you have now.
Your motor mounts on either side of the motor or at the front as I don't know the older trucks?
I came from the 80-86 area ad the frame mounts are different for the 300 six than the 302 / 351w and again for the 460 motors so 3 different sets of frame mounts.
If I am wrong I am sure someone will speak up.
Dave ----
Cargo Master
Joined: Sep 2005
Posts: 2,954
Likes: 64
As far as I know all 300's are the same up to the end. The EFI blocks don't have the fuel pump opening machined but I hear the cam has the lobe for the pump arm.
All the old manifolds will bolt onto a EFI head. What some do (me) is use the stock log intake manifold and the EFI exh. manifolds as they flow a litter better than the log exh manifold.
They say bolting on a 240 head will raise the compression half a point.
You did not say what motor & model transmission you have now.
Your motor mounts on either side of the motor or at the front as I don't know the older trucks?
I came from the 80-86 area ad the frame mounts are different for the 300 six than the 302 / 351w and again for the 460 motors so 3 different sets of frame mounts.
If I am wrong I am sure someone will speak up.
Dave ----
All the old manifolds will bolt onto a EFI head. What some do (me) is use the stock log intake manifold and the EFI exh. manifolds as they flow a litter better than the log exh manifold.
They say bolting on a 240 head will raise the compression half a point.
You did not say what motor & model transmission you have now.
Your motor mounts on either side of the motor or at the front as I don't know the older trucks?
I came from the 80-86 area ad the frame mounts are different for the 300 six than the 302 / 351w and again for the 460 motors so 3 different sets of frame mounts.
If I am wrong I am sure someone will speak up.
Dave ----
Tuned
Joined: Jul 2018
Posts: 279
Likes: 11
No. This has been asked and answered several times.
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Thread Starter
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Tuned
Joined: Aug 2019
Posts: 253
Likes: 4
from the research I’ve done I’ve found sources that say they are the same and some that don’t all you gotta say is no I don’t need you’re attitude I’ll just quit asking questions and go on my own
Lead Gopher
Joined: Aug 2012
Posts: 10,051
Likes: 1,607
From: Seattle
Motor Mount could be talking about two things. There is the Motor Mount Support, which many people call the perches. They attach to the frame and are the same 352 and 240/300 but each engine type uses different mounting holes for those supports.
Then there is the Motor Mount Insulator. They attach between the tops of the supports and the engine. These are different for the 352 versus the 240/300 types.
So, depending on which Motor Mount portion you are talking about you could both be right.
Then there is the Motor Mount Insulator. They attach between the tops of the supports and the engine. These are different for the 352 versus the 240/300 types.
So, depending on which Motor Mount portion you are talking about you could both be right.
Thread Starter
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Tuned
Joined: Aug 2019
Posts: 253
Likes: 4
Motor Mount could be talking about two things. There is the Motor Mount Support, which many people call the perches. They attach to the frame and are the same 352 and 240/300 but each engine type uses different mounting holes for those supports.
Then there is the Motor Mount Insulator. They attach between the tops of the supports and the engine. These are different for the 352 versus the 240/300 types.
So, depending on which Motor Mount portion you are talking about you could both be right.
Then there is the Motor Mount Insulator. They attach between the tops of the supports and the engine. These are different for the 352 versus the 240/300 types.
So, depending on which Motor Mount portion you are talking about you could both be right.
Lead Gopher
Joined: Aug 2012
Posts: 10,051
Likes: 1,607
From: Seattle
Yes, the left and right perches were the same from 1965-1968 for the FE engine and 1965-1972 at least for the 6 cylinder. The FE engine went to a different bracket for the drivers (LH) side in 1969 sometime when they switched from the bendix pump and gear to the saginaw pump and gear and needed it angled a bit differently for clearance.
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