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I've got a 1971 429 block bored to a 466 with dove c heads seal power pystons comp cam and valve springs , I've got an HEI distributor and new.wires and coils , intake is an aluminium edlebrock performer dual plane with edlebrock 600 cfm 1406 carb. Using stock exhaust manifold with a little cleaning and port matching on the manifolds and heads. Its gunna run just a hair over 9 to 1 compression I'm wondering what kinda torque and HP I'll make. Stock 1968-70 460 made 500 lbs of torque so I'm expecting something better does any have any theories?
 

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Lack of port work in the bowls where it really matters in conjunction with exhaust manifolds will likely net you about 350 hp as installed. 475 ish torque.

Similar combinations with headers and budget porting on the heads makes about 420 to 425 with 540 torque.


Oem ratings of 356 / 500 gross were not done with oem style exhaust.

Output as installed for the 10.5 to 1 460 was closer to 320 hp.






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What do you mean port work in the bowls ? Does that mean polishing the combustion chambers ? And my motor is going into a 82 f150 does anybody know of headers that I can bolt on that will fit without having to cut anything the guys who put my truck together cut the frame slightly to fit the exhuast manifold so I'd like to not do that.
 

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What do you mean port work in the bowls ? Does that mean polishing the combustion chambers ? And my motor is going into a 82 f150 does anybody know of headers that I can bolt on that will fit without having to cut anything the guys who put my truck together cut the frame slightly to fit the exhuast manifold so I'd like to not do that.
Polising the combustion chambers is not what he means. Have a look at this thread and then follow the links:
Porting C8VE heads

The links in the thread have everything you ever wanted to know about do it yourself 460 head port work.

I believe Heddman makes a set of headers for a 460 for that year of truck. but.. If they cut the frame rail to get the exhaust manifold in you may have some rigged up motor mounts & mount towers. They should not have had to cut the frame tp get exhaust manifolds in. There is a lot of room under those hoods. Maybe they tried to use an exhaust manifold off a car. I.D.K... That part sounds a little screwed up to me.
 

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Polising the combustion chambers is not what he means. Have a look at this thread and then follow the links:
Porting C8VE heads

The links in the thread have everything you ever wanted to know about do it yourself 460 head port work.

I believe Heddman makes a set of headers for a 460 for that year of truck. but.. If they cut the frame rail to get the exhaust manifold in you may have some rigged up motor mounts & mount towers. They should not have had to cut the frame tp get exhaust manifolds in. There is a lot of room under those hoods. Maybe they tried to use an exhaust manifold off a car. I.D.K... That part sounds a little screwed up to me.
Yes the exhaust manifolds were stamped for a 75 Lincoln I do believe so that would explain why they cut the frame or why they thought they had to.
 
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