I got a 70 mustang and a 460 engine to put in it. Does anybody know what it will take to do the swap?

 

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I had a 70 myself.

-gbm-

 

Google search "Mustang 460" and find:

https://www.fordmuscle.com/forums/al...8-mustang.html

Which will lead you to:

Crites Restoration - Parts List By Model

Your initial search will turn up Mustang forums as well.

IMO, unless you are going to build that 460 to 600-800 horse and drag race it, a small block would be a better choice. A 331 good for 400 horse with a 5 speed trans and some gears would be my choice. If you are going to drive the car on the street, a big block, FE or 385, isn't your friend other than when you are headed down a long straight and exercise the loud pedal. If that's what you want, have at it.

Please don't tell us you are going to put a stock 460 into this car, especially a truck-spec or worse yet, smog-spec 220 hp unit. Just burn the car instead.

Your car, good luck with it!

 

I second the vote for a small block. Though my choice would be an aluminum headed 351W stroked to 408 cid. Then throw a 5 speed in there and have fun. With all that aluminum it will take alot of the weight off the front end too. I have a '69 Mach 1 and that's what I am going to do with mine.

If you still do the big block don't forget to add the factory shock tower braces. I have seen them aftermarket. Crites might have them. That's alot of weight on the front end even with aluminum heads.

 

408s are great... thats what is going in my POS... its a 96 though...

460 would be great if you are going to punch it out past 540 cubes and put a nice set of SCJ Kaase Heads on it and the whole nine yards... but that gets expensive very very fast... not to mention not very streetable...

 

Yeah,thanx 85 , thats a start. I want my Mustang to be special. Thats why I bought the truck w/460 in it in the first place. The guy said it had been souped up and had too much power for his 16 yo son. I have a 69 that took me 3 days to put a 351C in because of all the fitment problems,but when done it turned out realy good and super fast.

 

I have a Boss429 - 429 in 70 fastback. The way Kar Kraft was able to fit this motor into the engine bay was to cut the shock towers, fold them in and brace it. Look at photo's of the Boss 429 and you will see what I mean. The hood scoop is not for show. If you look from fender to fender you will see the carb sticking up (above). I have seen people who have done this but it is a lot of work. Good luck. It is a fun car to drive and has a lot more power than a 428FE motor - my brother has a 69 428CJ.

 

Thanks for the info 42x, this is how you start a new project, by doing research and having a plan.

 

what did the stang have in it factory? if it was a 351c then an aluminum headed 460 would be lighter... even a factory iron 289/302 is about the same weight as an aluminum head 460. if its got the old 200 i6 then youve got more work to do stiffening the suspension. crites is a good place for retrofit parts, and as a 429 was a factory option in 1970 it will fit without modifying the shock towers, but depending on the intake you use you may need to modify the hood and put a scoop on. a low intake like the edelbrock performer will fit under the stock hood... the performer rpm is tight but doable, anything taller than that youll need a scoop.

 

If you want to make a clone or retro car, Kaase has reintroduced Boss 9 heads that on the outside are indistinguishable from the originals but will bolt onto any production or aftermarket blocks (the original Boss 429 heads used different oiling system and take a lot of modification to work on a non boss block) Do a stroker under those and a stock style intake and your looking at an easy 600hp on pump gas (Kaase just built a streetable, 880hp approx, pump gas 588 with these heads and dropped it into an 07 mustang) do the replicating of the work that was done on the originals in the engine bay and you have a show stopping powerhouse that will amaze people you are running and racing (the real boss mustangs were rare at only 1285 built in 2yrs)


Note those heads are NOT cheap, last I heard was $6700 for the heads and rockers.

 

I am a little curious about the weights. Even an alum headed 460 isnt lighter than much of anything.

Weight for 460 shown as 720#
Maybe ~60# saving for alum heads, that would be ~660#. Even alum intake ~30# saving (if that much) thats 630#.

351W--525#. 351C--550# M/400--575# Then add aluminum to those.

The 91 factory spec sheet shows the 302 at ~500# (dressed).

Not trying to flame anyone, but from a weight standpoint, a 429/460 will definately be felt on the front end.

I have a 70 Mach I that I am strongly looking into a 434 stroker. Lets see, alum heads, (minus ~40#) alum intake (minus ~25#) looks to me like about 500# . Not as much power, but much more streetable. Unless you tub it and race it, even a worked 351C will overpower most street tires (my opinion!). These weight figures are approximate---and all of it is my .02.

Now if I can just prod havi into finishing his fox body 400-------

 

The 429 was an option in 1971. Trust me a 429/460 is going to take some work to shoehorn it into the engine bay. On a side note the master cylinder is a custom part for the Boss429, beleive it or not it is tilted up to fit in the car with the motor. Also to change the plugs (driver side) you have to pull the motor - at least lift it several inches.

Wayne

 

Banshere everyone trys to hammer on the 460 as being sssooo much heavier then say the 400, but have you ever done the measurements on ride height on a vehicle when doing the switch from a 400 to a 460? it makes between non to 1/8" difference.
Fact is that I don't have a clue where that 720lb list comes from VS all the other engine weights, I have never found a 460 that weighed over 600 personally. Only thing I have ever been able to figure out was when they did the "listed" weights the 460 was done complete with all the accerories everything else done as bare long block. Truth is a 460 is at best about 40-50lbs heavier max.

 

It appears you and I are looking at different fact about the 460's

Stating the facts is not "hammering". If you think you have never had a 460 that weighed over 600# then you had something else besides a 460.

I am not the one who dreamed up the 720# figure for a 460. One listing shows the 429 boss at 685#, and thats with aluminum heads and alum intake. I was being generous in my earlier post when I guessed at the weight loss by adding alum parts to the 460.

Most charts include the front dress of the motors and generally include the starter and fly/flex. Front end drop is a function of spring ratings and not all about engine weights. I have had first hand experience with 429/460. I took a 1969 galaxie 500 XL w/390 and FMX including air conditioning and found an "excuse" (you know, to justify to the little woman ) and replaced it with a 429 CJ (converted to a 460 CJ) and a C6, which I rebuilt myself----my first C6 rebuild. The CJ motor had big port iron heads, cast iron intake with a Quadrajet. Without the air compressor, the car picked up about 60# over the 390 as measured at the local scales. FE motors are shown at ~675# (dont have the chart in front of me).

While the M/400 is about the same width (10.297 DH) as the 460, the extra weight (lots of) is from the greater bore spacing of the 429/460. That extra iron plus the heavier crank for that spacing is the difference. The SVO catalog lists the C/M/400 as "small blocks and thats what I think of them. However, that is a very ambiguous term and I think you can call them whatever you like---O.K. with me. Visually the 400 looks as big as a 460 because from the top view it is as wide. Using that standard, the 4.6/5.4 modular motors are also big block----"taint" so!

Lets not get into a pizzin contest over weights. I believe in my known facts, and you believe in yours thats perfectly acceptable to me. Others should make their own decisions on the subject. I have found that quite a few "fine fellers" dont agree with me, but we arent going to be at 50 paces at dawn

 

Boss 429: 1969/70 Mustang.

429 CJ = 1971 Mustang.

C9ZZ-2140-B .. Master Cylinder / Fits 1969/70 Boss 429 Mustang only.