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Good day fellows! As you can see in the title, I'm new here, and I'm looking for info. First though, let me give some background on myself.

My names Luke, I'm 20, attending college, and I was born and raised in West Tennessee. From the age of around 13 or so, I've wanted a classic Mustang. It's my dream car. I'm graduating in 2018, and I have a job and place to live already lined up.

As soon as I have the money, I plan to buy a 1969-1970 Mach 1. I like the trim, the matte hood, the overall aggressiveness of the body. And the little spoiler (lol). I also plan to drive the living hell out of it. I think I can have thirty grand lined up to buy one within a couple of years of graduating, if everything goes according to plan.

I have plans to acquire a Mach 1 with a SCJ 428 ideally. I'll probably end up buying one with a 351W or 390 and then doing a swap for a 428 myself later on.

Now comes my question for you fellows: I have been doing research on the subject, and I have found that the 4.3 gear ratio 4 speed manual gives you the best zero-60 time (5 1/2 seconds when coupled with the 428, I believe) which is what I want. But mpg and top end suffers greatly. I know that there must be more modern trannies available, perhaps a five or six speed, that could still achieve the fast zero-60 time, and increase top end speed and mpg.

For my purposes, what is the absolute best transmission I can purchase? I'm not expecting twenty miles to the gallon or a top speed of a hundred and seventy. I just want to get every bit of horse power, torque, and efficiency I can out of that old car. I'm hoping you guys have the answer.

Once again, I don't own this sweet piece of awesome yet, but it is gonna happen. I'm not gonna waste y'all's time, rest assured. Any help you fellas can give is most appreciated.

Luke Switzer.
 

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Now comes my question for you fellows: I have been doing research on the subject, and I have found that the 4.3 gear ratio 4 speed manual gives you the
Perhaps you're reading about a 4.30 rear gear ratio (differential) along with a 4-speed toploader transmission being used?

:cheers:
 

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In order to get the 428SCJ you had to order the "Drag Pack" option which included either 3.91 or 4.30 gears and an oil cooler IIRC. Any other rear axle ratio got you the 428CJ. Also a 428CJ or SCJ Mach1 came with staggered rear shocks. A 351 or 390 Mach1 came with the standard shock mounting.
A genuine R code 428CJ Mach1 will cost a wheelbarrow full of money. A genuine R code 428SCJ (Drag Pack) Mach1 will cost a dump truck full of money.
You will need a TKO 600 5 speed behind the 428.
And by the way- only the '69 Mach1 had the blacked out hood. The '70 had stripes.
 

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Welcome aboard. You'll get plenty of advice here.
Stan
 

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Discussion Starter #7
In order to get the 428SCJ you had to order the "Drag Pack" option which included either 3.91 or 4.30 gears and an oil cooler IIRC. Any other rear axle ratio got you the 428CJ. Also a 428CJ or SCJ Mach1 came with staggered rear shocks. A 351 or 390 Mach1 came with the standard shock mounting.
A genuine R code 428CJ Mach1 will cost a wheelbarrow full of money. A genuine R code 428SCJ (Drag Pack) Mach1 will cost a dump truck full of money.
You will need a TKO 600 5 speed behind the 428.
And by the way- only the '69 Mach1 had the blacked out hood. The '70 had stripes.
Yeah, like I said, I'll probably buy one with a 351 or 390 and then eventually build it into a SCJ type.
Thanks for the info on the tranny! And the hood. I hadn't realized that about the stripes on the 70 model.
 

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Tremec T56, not sure how you get it to fit, maybe its not a problem, most are hydraulic clutch



Another option would be to keep the top loader and put a Gear Vendors OD behind it.
 

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How much money do you think your endeavor will cost?
He mentioned 30K.

Not sure that's realistic.

Here's the real deal advice to the OP...If your goal is to buy and own a car, go find one and buy it. You can buy more car than you can build for the same $'s.

In your case, since originality is not a concern, you can look for any sportsroof of the correct year that someone has already dropped an upgraded engine into. Don't get hung up on the 428CJ. I mean, if the car had it originally, you'd want it for sure. But the car you describe, if factory stock, would very likely be three times your budget and you'd be afraid to drive it hard because of the value.

Phil
 
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He mentioned 30K.

Not sure that's realistic.

Here's the real deal advice to the OP...If your goal is to buy and own a car, go find one and buy it. You can buy more car than you can build for the same $'s.

In your case, since originality is not a concern, you can look for any sportsroof of the correct year that someone has already dropped an upgraded engine into. Don't get hung up on the 428CJ. I mean, if the car had it originally, you'd want it for sure. But the car you describe, if factory stock, would very likely be three times your budget and you'd be afraid to drive it hard because of the value.

Phil

Right, $30K will get you a nice car, already done. But if that was the final money, then nope.But no 428, maybe a 390, but probably a 351. If you want a project, then it will cost less, but the 428 goal will put you way over. They are expensive, just the parts. regardless of the fact that it was never a 428 car to begin with. The engine pieces and other parts for a 428 will up the total money spent by a lot.
 

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Discussion Starter #17
He mentioned 30K.

Not sure that's realistic.

Here's the real deal advice to the OP...If your goal is to buy and own a car, go find one and buy it. You can buy more car than you can build for the same $'s.

In your case, since originality is not a concern, you can look for any sportsroof of the correct year that someone has already dropped an upgraded engine into. Don't get hung up on the 428CJ. I mean, if the car had it originally, you'd want it for sure. But the car you describe, if factory stock, would very likely be three times your budget and you'd be afraid to drive it hard because of the value.

Phil
When I quoted the 30k, I meant for the car itself, in drivable condition. From what I've seen on Craig'slist and EBay, that seems to be a fairly accurate price. I could be mistaken though. I'm pretty sure that when I do get ready to do some upgrading, I'll be spending another ten or fifteen grand on just the motor and transmission. As You said, I'd probably have a tough (impossible) time getting my hands on an original 428 Mach 1 for a reasonable amount of money. I'm on the lookout for one that has already been modified, but I haven't seen many at all.

Thanks for the reply!
 

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Whatever car you decide on when the time comes, make sure you do your research for that particular vehicle. It's easy to get caught up in the moment and make a poor decision because the excitement of owning one overwhelms you. I would post photos on here before buying so everyone can check it out for you. If I could go back, I would have probably passed on my car or at least offered lower because there was a lot of underlying issues I didn't think of or check for. It ran well and seemed to shift good so I bought it.
 

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