Building 351M
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From: Chico
Building 351M
Hey all. After I pulled my old 351 from my truck(I did a 460 swap) I decided I wanted to rebuild this engine with quite a bit of horses and im planning in putting it in a Ford car. My Crank is in good shape and im mostlikely going to replace the cam. My question is; what do I need for this motor so it pushes atleast 400hp (if possible for this engine block). Should I go with Alluminum heads or cast iron? DO I need to bore the block a little bit more? Im a little new to rebuilding this engine but I do know how to work on engines. Money is little bit of an issue because Im in High School and I'll be rebuilding this in my autoshop class, but I think I can get enough money when I get another job. Sorry for long read but thanks for your input.
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First of all you should get a 400 crank and pistons since it is a 351m and the only diference is the crankshaft and the pistons , everything else works, then a nice cam, a good intake, a carb and some headers,
Im doing exactly what you are doing, adn im kinda difrently oriented than guys in this forums, cuz i have a 2400 lbs muscle, so im using a long duration crane cam (282 degrees intake 290 exht) some 9:1 pistons a milled deck, a sigle plane intake manifold , a 850 vacum secundaries carb, and home made thick headers with 4 moflers,
I havent spent more than 1000 bucks on my stuff and im cose to the 400bhp
I personally prefer the 400 more for a street / performance engine than a 351c, cuz the streetable amount of horses you can get on a 400 are way off than for a 351c because of the fast torque peaks, sure a 351 c revs fatser but you couldnt get a 400 horses 351 c be as drivable as a 400 horses 400, hell im using a stock stall converter and my tires are leaving marks!
So it all depends on your aplication....
anyways, start with a cam ( about 130 bucks ) pistons ( 100 aprox ) ( used crank 100 aprox ) leave the rest stock , then save to buy the intake carb and headers that are very easy to install...
Im doing exactly what you are doing, adn im kinda difrently oriented than guys in this forums, cuz i have a 2400 lbs muscle, so im using a long duration crane cam (282 degrees intake 290 exht) some 9:1 pistons a milled deck, a sigle plane intake manifold , a 850 vacum secundaries carb, and home made thick headers with 4 moflers,
I havent spent more than 1000 bucks on my stuff and im cose to the 400bhp
I personally prefer the 400 more for a street / performance engine than a 351c, cuz the streetable amount of horses you can get on a 400 are way off than for a 351c because of the fast torque peaks, sure a 351 c revs fatser but you couldnt get a 400 horses 351 c be as drivable as a 400 horses 400, hell im using a stock stall converter and my tires are leaving marks!
So it all depends on your aplication....
anyways, start with a cam ( about 130 bucks ) pistons ( 100 aprox ) ( used crank 100 aprox ) leave the rest stock , then save to buy the intake carb and headers that are very easy to install...
Last edited by hollenjoe; Aug 22, 2007 at 10:36 PM.
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Junior User
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From: Chico
Thanks for the reply hollenjoe. Is there a certain kind of cam to get? what degree of lift? ext. And do you think i should port the stock heads?
As for a 400 crank I can get that when I get a better set of cylinder heads at a pick-and-pull. And will I have to bore my engine to fit 400 pistons or will they be the same?
As for a 400 crank I can get that when I get a better set of cylinder heads at a pick-and-pull. And will I have to bore my engine to fit 400 pistons or will they be the same?
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keep the stock cilinder heads, instead mille them by .0025", get some 9.5 to 1 pistons from tmeyer (the sponsor of this forum) for 130 bucks, get the crankshaft and you dont have to bore the engine since the bore of a 351 m is the same as a 400 (4"), the 400 crank and pistons will fit perfectly as a 351m is a destrocked version of a 400 and you would only be strocking it back to normal, and I personally love this cam
( http://www.cranecams.com/?show=brows...tType=camshaft ),
start this way, its not possible to port your valves on your stock heads, but its ok, with this components plus a 750 carb headers and intake you should have a monster,
buying a new aluminium head is to expensive for my taste, but aha its just me....
( http://www.cranecams.com/?show=brows...tType=camshaft ),
start this way, its not possible to port your valves on your stock heads, but its ok, with this components plus a 750 carb headers and intake you should have a monster,
buying a new aluminium head is to expensive for my taste, but aha its just me....
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