motor replacement
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Joined: Mar 2003
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From: rural manitoba
motor replacement
my 84 f150 4+4
has 300il 6 i have a 351 engine i would like to put in it
it has a 4 speed tranny my question is will the v8 fit
the 4 speed and will i have to get another flywheel or can i use the one off the 6 cylinder
has 300il 6 i have a 351 engine i would like to put in it
it has a 4 speed tranny my question is will the v8 fit
the 4 speed and will i have to get another flywheel or can i use the one off the 6 cylinder
Posting Guru
Joined: Jan 2001
Posts: 2,357
Likes: 3
From: S. Mississippi
motor replacement
You can swap in the 351, but you'll have to swap motor mounts, and use a flywheel for the 351. The 4 speed will bolt to the 351.
Why are you getting rid of the six? Not enough power?
If thats the case, and you have a high gear ratio (say 3.00's or 2 somethings.) that 351 is going to be even more of a pig.
But if you have to have the 351, its a direct swap in, so long as its a 351W, the 351M uses a different transmission bolt pattern...i think it uses one for the big blocks 429/460.
Why are you getting rid of the six? Not enough power?
If thats the case, and you have a high gear ratio (say 3.00's or 2 somethings.) that 351 is going to be even more of a pig.
But if you have to have the 351, its a direct swap in, so long as its a 351W, the 351M uses a different transmission bolt pattern...i think it uses one for the big blocks 429/460.
Thread Starter
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New User
Joined: Mar 2003
Posts: 4
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From: rural manitoba
motor replacement
thanks for help kinda like the 6 but was wanting little more power had motor sitting around was wondering if it was worth doind oviosly not worth the trouble getting good miledge with the 6 so think i will forget the extre power and stay with orginal motor again thanks for the help
Posting Guru
Joined: Jan 2001
Posts: 2,357
Likes: 3
From: S. Mississippi
motor replacement
The 300 is a long lasting engine, it will outlast most any other engine, some go on into the 300k range, without a rebuild.
If you want to get some more power out of your truck, port the head, change the intake, add a 2bbl carb, a little cam and a free flowing exhaust will help a lot.
Changing the rear gears out might help too...depending on what you have.
Take a look at the axle ratio sticker on the door, and post what you have for the axle code, and i'll try to look it up for you.
If you want to get some more power out of your truck, port the head, change the intake, add a 2bbl carb, a little cam and a free flowing exhaust will help a lot.
Changing the rear gears out might help too...depending on what you have.
Take a look at the axle ratio sticker on the door, and post what you have for the axle code, and i'll try to look it up for you.
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