351 to 302
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From: Houston
351 to 302
I have a problem i have a rod knock in my 84 351 c-6. But I have a good running 302 aod out of a 83. I want to pull the 302 and drop into the 84. Is there anything I have to change to put the 302 behind the c6. I dont want to downgrade to the 302 but I can't afford to buy a new motor. Thanks for any help.
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From: Virginia
351 to 302
Should swap right in. I don't know about the flywheel though. You need to see if the 302 aod flywheel will work on the c6. Look at the oil pans, but if they are both from trucks it should be ok too. I guess you could swap in the aod too, if it's in the same configuration as far as driveshafts, but this would be alot more work. It would be easier to get a flywheel for the 302 if you needed one and mate it to the c6.
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From: b.c. canada
351 to 302
gingerbreadmaniac
the 351 is wider and higher than the 302 the block is the same but it has bigger heads and i do not believe your exhaust manifolds will line up, you will probly have to take it to a exhaust shop or do it yourself. I am not sure about this but i believe it to be true
gingerbreadmaniac
aka JOSH
the 351 is wider and higher than the 302 the block is the same but it has bigger heads and i do not believe your exhaust manifolds will line up, you will probly have to take it to a exhaust shop or do it yourself. I am not sure about this but i believe it to be true
gingerbreadmaniac
aka JOSH
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From: Virginia
351 to 302
Yep, I forgot about the exhaust. The manifolds will interchange as far as the bolt pattern to the heads, but the outlets are not pointed in exactly the same direction. I put a 351w in place of a 302, and I used the 302 manifolds, but had to split the y-pipe to make it work. If you get the junkyard stuff, it will fit perfect. I checked and didn't have the money at the time, but they wanted $50.00 each for the manifolds, and advance auto wanted $100.00 for the y-pipe with a 5 foot section made on to it to the rear.
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351 to 302
The manifolds are identical between the 302 and 351w. The reason the crossover pipe doesn't work is due to the 351 having a taller deck that makes the heads 2" farther apart meaning that the crossover has to be 2" wider at the donut gasket. Make sure you use a flexplate off the 302 and get your crossover widened and the rest is a straight swap.
RCC
RCC
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From: MCBH Kaneohe Bay, HI
351 to 302
I dont know if this applies to you, but the 302 and 351 distributors might be different, i know the firing order is different. the belhousing bolt pattern is all the same from a 289 to a 351 Windsor. I'd use the aod, it has overdrive. I dunno if the aod is longer or shorter than a c 6, i think its longer. I put a new 302 in my 84 f 150 xlt this past summer and it was a snap, but i just replaced it with the same kind of motor.
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From: Houston
351 to 302
Thanks for the info.
I have the whole truck that the 302 is comming out of. Can I take the y-pipe off it? It's a reg cab long bed, the 84 is a ext cab long bed.
I have the whole truck that the 302 is comming out of. Can I take the y-pipe off it? It's a reg cab long bed, the 84 is a ext cab long bed.
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From: Virginia
351 to 302
>The manifolds are identical between the 302 and 351w. The
>reason the crossover pipe doesn't work is due to the 351
>having a taller deck that makes the heads 2" farther apart
>meaning that the crossover has to be 2" wider at the donut
>gasket. Make sure you use a flexplate off the 302 and get
>your crossover widened and the rest is a straight swap.
>
>RCC
Are you positive about this? The reason I am doubting what you said is:
1. There is a different part # for the 351w manifolds.
2. The ports were a little smaller on my 302 manifolds compared to the car manifolds I took out.
3. My 302 manifold on the pass side has an angle that sort of flared it out away from the engine. When I used it on the 351w, it made it interfere with the frame of the truck. It required a sharp crook to bring it back away from the frame.
>reason the crossover pipe doesn't work is due to the 351
>having a taller deck that makes the heads 2" farther apart
>meaning that the crossover has to be 2" wider at the donut
>gasket. Make sure you use a flexplate off the 302 and get
>your crossover widened and the rest is a straight swap.
>
>RCC
Are you positive about this? The reason I am doubting what you said is:
1. There is a different part # for the 351w manifolds.
2. The ports were a little smaller on my 302 manifolds compared to the car manifolds I took out.
3. My 302 manifold on the pass side has an angle that sort of flared it out away from the engine. When I used it on the 351w, it made it interfere with the frame of the truck. It required a sharp crook to bring it back away from the frame.
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351 to 302
The only time they match up is one of two ways a convertor, or if you have the rare C6 small block. Advance Adapters sells these I do believe. They have them for almost anything. You can find them in a 4x4 mag. I hope I am remembering that correctly, its been awhile.
CJ
CJ
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351 to 302
Franklin2
There are many different part #'s depending one what the part was originly designed for. When it comes to trucks, it's the drivers side manifold that is not exchangable between cars and trucks. This is because the car manifolds (both sides) generally exit straight back or turned down and behind the rear exhuast port. The drivers side truck manifold requires the exit to be below and between the #7 and #8 exhuast ports. I have all kinds of different manifolds for the 302/351w including a 'hugger' profile drivers side truck manifold (don't have the mate, oh well). Can't ever tell you what truck would require a 'hugger' profile manifold but Ford made it for some reason. Would like to find a mate for it just because it's different.
RCC
There are many different part #'s depending one what the part was originly designed for. When it comes to trucks, it's the drivers side manifold that is not exchangable between cars and trucks. This is because the car manifolds (both sides) generally exit straight back or turned down and behind the rear exhuast port. The drivers side truck manifold requires the exit to be below and between the #7 and #8 exhuast ports. I have all kinds of different manifolds for the 302/351w including a 'hugger' profile drivers side truck manifold (don't have the mate
, oh well). Can't ever tell you what truck would require a 'hugger' profile manifold but Ford made it for some reason. Would like to find a mate for it just because it's different.RCC
