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Old 09-09-2004, 10:30 PM
buttnuttn8 buttnuttn8 is offline
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ford 400 with 351c heads spacer plates

Hi i read in a book and have comfirmed it with other people on this site saying you can put 351c 4v heads with a 351c intake manifold on a ford 400. Im in need of the spacer plates because they are now discont. im woundering if anyone has a spare set or willing to sell me a set or even the blue prints because the set i have do not work and thats all i need for my rebuild

thanks ahead of time
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Old 09-10-2004, 08:11 AM
ReGGaTarT ReGGaTarT is offline
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try www.flatlanderracing.com. Let us know how it work on your engine. I'm planing to do the same thing, exept with 3v chi heads. I think I'm gonna have to port match.

Does any know about that?
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Old 09-10-2004, 01:18 PM
mmidgett mmidgett is offline
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www.pricemotorsports.com is where I got my 400 deck to 351W deck so I could use a trickflow R
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Old 09-10-2004, 08:58 PM
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danlee danlee is offline
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ReGGatart,

CHI will supply the spacers required for the CHI-3V heads.

To port match, line the spacer plates up against the intake manifold as they will be when mounted on the head. Mark any area on the spacers the protrude into the manifold port area. With a dye grinder or other tool remove the material from the spacer that protrudes into the port area. The spacer should match the head side, but if any material on the head protrudes into the port area remove that as well. Don't take material from the intake manifold.

The air flow should not run into any walls in the transitions from manifold to spacer and from spacer to head.
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Old 09-10-2004, 11:41 PM
buttnuttn8 buttnuttn8 is offline
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the set i have came from weind but i bought them off someone that said it would work and they match the numbers, they fit on the heads GREAT! couldnt ask for better but on the weind intake its WAY WAY WAY off like you can see light threw the ports on some of them so i cant take away metel when you can arleady see threw them. so im not sure if someone before me mod them or what the storie is..

i guess somone told me i can use 351m intake but that kinda defeats the purpose of puttin on the huge ported 351c heads because the 351m intake is 2v not 4v

thanks for the web sites im gonna check that out now
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Old 09-11-2004, 12:37 AM
grclark351 grclark351 is offline
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have you tried switching the plates side to side and top to bottom to get a better fit?
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Old 09-11-2004, 08:40 AM
ReGGaTarT ReGGaTarT is offline
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buttnutt8
What weind intake is it ?
Is it for a windsor or cleveland?
Maybe you don't have the right set of spacers
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Old 09-11-2004, 01:59 PM
Thrillseeker Thrillseeker is offline
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Although I have not tried the swap that you are doing At one time I thought about as I have close chamber 4V heads and at the time was building a .040 over 400.. If you check out PAW (performance automotive warehouse) you will find that they carry a set of plates that you need to put a 351C intake on a 400 part# WEI-8205.. When I had thought of doing this swap I thought of using the Weiand 4 barrel intake I bought for the 400 and doing a little porting on the intake to see if things would line up.. But I was so pressed for time I never got to see it the 400 intake could be opened up..
Good luck with what you have in mind.. I still to this day would like to see what would have been. but I no longer play with the 351M-400.. I will say this and that is I know you can make a 400 that will give you 380 HP and about 465 LB ft of torque.. and you can do that for less than $2000.00 the price that PAW has is $129.95

Last edited by Thrillseeker; 09-11-2004 at 02:08 PM. Reason: add price
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Old 09-11-2004, 02:28 PM
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danlee danlee is offline
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Buttnuttn8,

Do you have a Weiand #7516 intake? That is a 4 barrel intake for 351C 2V heads. If your Weiand #8205 spacer plates have been port matched to a 351C-4V intake, then the holes will be too big. The Weiand spacers are made for 2V heads, but they can be used with 4V heads by enlarging the ports to match the 4V ports.

You should have a Weiand #7517 intake (351C-4V), or you can get a new set of spacers and do your own port matching to the 4V heads.
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Old 09-11-2004, 02:28 PM
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351c, 400, 400m, 7516, 8205, ford, heads, intake, manifold, plates, port, price, spacer, spacers, weiand

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