Tag: datsun

Dear Welder Series… MII for Datsun 521?

Dear Welder Series…
Hello, I was looking at your Mustang II crossmember kit. I’d like to get one for my Datsun 521. I was wondering if you would be able to decrease the width of the crossmember sections by 3” to accommodate the more narrow track width of my truck. I guess I could section it myself but that wouldn’t look as clean. The suspension parts aren’t readily available for my truck so I’d like to use this setup.
Thanks,
John

Dear John…
Hi, John.

We can make special width crossmembers, but…
The actual track width might not turn out to be what you hoped for. The brake kit used can move the wheel in or out from where the stock Mustang II was. You might also find that narrow control arms can be used that will reduce the track width and give more clearance in the engine room for exhaust and steering, even if you will use the stock engine.
Our website has some Mustang II dimensions at https://welderseries.com/tech/tech-sharing/ifs-make-your-own/. These dims will give a track width of 56-1/2” when stock 1974-78 Mustang II rotors and control arms are used. Narrowing the dimensions, top and bottom, will bring the wheels closer together by that amount. Shorter control arms will do the same. The brakes used might move the wheels in or out. We have info about our brake kits at:
If you use 4-bolt MII rotors, there should be no change.
My suggestion is:
Get everything you need except the crossmember kit, springs, shocks, and the steering rack. (Wheels & tires, brakes, spindles, and control arms)  A custom rack will have to be ordered after the width has been determined. Springs and shocks can come after that.
Remove the stock front suspension.
Block the truck at ride height.
Mock up the wheels & tires, rotors, spindles and lower control arms.
Position the tires in the fender. The tires should be very close the vertical.
Block the lower control arms at horizontal.
Measure the lower control arm mounting hole center-to-center.
Subtract that dimension from 22-1/4”. This is the amount to remove from the crossmember.
Buy our 56-1/2” kit and remove that amount from between the rack mounts.
The rack will have to be shortened the same amount.
Before doing much more, check the cost of this to be sure you are comfortable with it.
I hope this helps with this part of the project.
Paul Horton
Dear Welder Series…
Paul,

Thank you for all the information and help. I figured that the control arms would have to be shortened as well. I saw a couple of your customers vehicles who did the same thing. Have a Happy New Year.
Johnathon

Dear Welder Series… 1976 Datsun 260Z Mustang II

Dear Welder Series… 
I’m customizing a 1976 Datsun 260Z for a client. It has an all aluminum Mustang Cobra 32V V8 up front and a narrowed 9″ triangulated 4 link setup in the rear. I want to put something like your Mustang II IFS kit on the front and get rid of the struts so that I can mount a wider torque thrust II wheel to match that back.

The frame rails have a lip that sticks out a little on the bottom facing out, and the width from that outside edge to outside edge is 32″. They are smooth on the inside.

Do you have something that will work for me? If you do, can you send me other dimensions so that I can measure up to make sure everything will fit under the original fenders?

Any help would be appreciated,

Thanks.

Brett

Dear Brett…
Our Mustang II coil spring kits are designed to be installed in almost any frame. What measurement do you want between the wheel mounting surfaces? (Where the wheels are against the rotors…)

What diameter tire will you use on the front?

With the frame at ride height, what is the distance from the ground to the bottom of the frame at the spindle location?

As above to the top of the frame?

With this info, I’ll be able to tell you about installation issues you might run into and suggest ways around them, if necessary.

Thanks for looking at Welder Series parts.

Paul Horton

Dear Welder Series…
Thanks for getting back to me.

There are a lot of questions there that I don’t have the answers to yet.

I’ve just finished the back end of the car, so let me measure the front up this weekend and I will get back to you.

Cheers,

Brett.

Dear Brett…
Thanks, Brett. I might be slower getting back to you for the next week or so… There will be days when I’m out of internet access. I’ll try not to keep you off the road too long…

Paul Horton

Dear Welder Series…
Here are those numbers!

What measurement do you want between the wheel mounting surfaces? 54″

What diameter tire will you use on the front? Don’t know yet, but to match the rear the center of the front spindle will need to be 12 3/8″ from the ground.

With the frame at ride height, what is the distance from the ground to the bottom of the frame at the spindle location? 11″

As above to the top of the frame? 14″

This car is pretty low, so if we need to go up or down a little, I would prefer to go up a little on the ride height. We have a tri-4-link with coil overs on the back so we can always adjust the back up or down to match whatever the front ends up being.

Cheers,

Brett.

To Be Continued…