That's an awesome truck! I am 14 and I bought a 1979 ford f250 with a 400m, glasspacks, 4 on the floor and 315/75R16 on the truck! I boughtmy baby it when I was 13!!
To those calling the 351M and 400 a "piece of crap, a paper weight, boat anchor, gutless pig," etc., tell that to Jon Kaase. He won the Engine Masters Challenge with a 400 back to back in '08 and '09 and should have won it in '07 as well but a technicality cost him the victory. Even more annoying was that those hosting the event constantly refered to the 400 as a 400M. Don't underestimate these engines people. They came out in an era where emissions were starting to be cracked down on by the EPA and it was restricted from the factory so it never reached it's full potential in stock form. True, some of the blocks had their issues but if you know what to look for, all it takes is a little know-how and you can turn these junkyard gems into a real screamer. As far as those calling the 400 a "400M", I mean, come on, it's kind of hard for someone to have a credible opinion about an engine when they know so little about it and have done such little research that they don't even know what the engine is called!
you dont know how much someone can hate them until you hear my grandpa talk about them lol. i personally think they are a good engine for what they are, good low end torque stock and they can be built to be good engines.
@50fordman - nice man. i'd like to get a 250 some day, i'd like to start gettin into truck pullin. (i'm sick of cleaning mud!). good luck with your project.
One of my members has a truck identical to that. At least, it was. 79 F150 400M 4 speed on 35's. Used to even be flat black. Recently, he painted it AC orange. But, you can see it on my channel.
nice man. yeah its true the 385 series has more power potential if your planning on building a serious motor. just givin ya crap cause alot of people dont like the 400s.
@TheMstrmuse1 6 inch can fit 38.5 Ground Hawgs, borrowed my neighbors tires when I got my 6 inch on my 78 Bronco. I'd go ahead and get a 9 inch that way you have alittle more clearance, was pretty close with the 38.5 Hawgs.
@fomocowboy - i feel sorry that you don't understand the concept of it. (REAL) dual exhaust IS referred to as true duals. some people say they have "dual exhaust" but its just split from the cat or muffler back. instead of people saying i have a "real dual exhaust" system its referred to as true duals. once again sorry you cant wrap your mind around it.
@fomocowboy - are you serious? true dual means 2 pipes from the engine block back. that is what this is. an H pipe connecting them doesn't not make it true dual. if it had a Y pipe connecting them (2 pipes into 1) then it would not be. The H pipe equalizes exhaust flow between each pipe and is supposed to give a little horsepower gain.
lmfao thats a nice comeback dude. but you cant deny it, when you start to seriously put money in an engine its 385 series over the 335. i just bought a wrecked 77 F250 with a 4speed and 400m, its a highboy, i lan on making it look alot like this but in kabota orange.
Why does everyone insist on throwing an "M" after 400? It's not like you need to do it so you don't confuse someone from mixing it up with another 400 cubic inch Ford engine. The reason why Ford puts an "M" after 351 is so you don't confuse it with the 351C or 351W. There is no reason to do so with the 400 so people can stop this any time now. Contrary to popular belief, Ford never in any of their literature refered to the 400 as a "400M", EVER. Neither did they call the 351M a "351 Modified"; that is also another term people chose to give it because they felt that was most obviously what Ford ment since it IS a "Modified" version of the 400 engine. Yes, I know Ford based some of the 400's design off of the 351 Cleveland but even still, the 400 and 351C are different blocks so the 400 is not a Modified version of it. If you look at the valve covers of any 1971 to 1974 Ford 400 engine, it does not have an "M" after the number 400. Not until 1975 when Ford destroked the 400 down to a 351 did they put an "M" on the valve cover decal. Even still, the 400 never got an "M" after it because it was never a "Modified" version of anything. Pre-'74 valve covers say "400" and '75-'82 valve covers say "Engine Family 351M/400"; still there was no "M" after 400. Only in magazines, non-Ford published books, internet articles, and by word of mouth does the 400 get an "M" after it. Ford has always called it what it is, just a 400.
Doesn't matter what you wanna call it 400/400m people know what you're talking about. Lots call it a 400m because it's the same block as the 351m. You're right, valve covers don't say M on 400s but M is stamped on upper corner of the head. But once again same heads as the 351m.
@dylanguay right, 2 UNCONNECTED pipes from the headers back, is true dual, an H pipe connects them, therefore not being true dual. I know what an H pipe DOES, I'm just confused on what you're considering as the definition of "true dual"
i got a 78 f250 longbed on on 37's its all in good condition but im trying to find a bench seat in good shape anyone has one they can sell or knows were i can find one please lemme no
@fomocowboy why the fuck would a pipe connecting them not be true duals? the 2 pipes dont merge into one pipe at any point from the motor back with an H pipe. where did you get the definition that says 2 "unconnected" pipes? as long as the pipes don't merge into one pipe at any point i would say that is true duals....
