I have one of these with all the suspension mods. with a couple mods you dont need to get rid of the leaf setup. my car has similar corner speeds to modern hot hatches. rear traction is not a problem at all!!!!!!
I am using stock leaves with the overload removed, crazy carpet between the springs, changed all the bushings to aluminum.
I have "slapper bars" on the car which control axle wrap and stiffen the rate a fair bit as they clamp the springs.
For Shocks im using PRO shocks PG series (now discontinued) in 4/4 valving. they are the 11 inch long body ones, same as what you'd use on a 2nd gen camaro.
I had the stock rear diff for a while, then I went with a ford 8.8 (for drag racing)
The design of the springs are very similar to 1200/b210/b310 springs. I'd like to get a set of nismo rear springs for a 1200 and see if they bolt in.
if you dont need more power, run the stock axle. if you need an LSD there is a toyota center section that the axles will fit in, they just need the mounting holes re-drilled for the pumpkin.
LSD's for H165's are like hens' teeth.
These cars desperately need better brakes. if running a stock axle, making brackets for S13 Rear brakes is highly reccomended.
With my current setup i get a little bit of understeer with the 1 1/8" swaybar on it. it needs a baby bar on the rear or maybe a lil smaller front bar. i can only get the rear to come loose if theres some shit on the road, clutch kick it or spray the fuck out of it with the street tires on it (NOS).
As for the front, S10's are a little bit different than a 510, they are more like an A10 or a 710.
you can use 510 aftermarket control arms and such, but they will be wound out a little farther than usual. these bolt on. (i am using the futofab ones.)
For a sway bar, you need to trim the lil front lip off the crossmember a half inch off and drill new sway bar mount holes to mount an aftermarket 510 bar on it. (i have the futofab one)
For Strut Swaps, everything is the same. the stock spindles are large like a 280z,zx but with the worlds shittiest brakes and theres nothing that you can really swap onto the stock struts. I tried.
280zx struts bolt in.
s12 200sx struts are allmost bolt in, you need RCA's to go from the small 510/280zx knuckle reciever to the 200sx/300zx size. the bolt holes are the same but the centering rings are different. they will actually bolt on but you are relying on the shear strength of the 2 bolts. (this latter setup is what i am using with tokico illuminas and GC coilover kit)
Ball joints are same as any later datsun ball joint.
the 510 steering box braces wont work as its a 4 bolt top box instead of the 3 bolt ones.
tie rods are the same as 510.
my biggest gripe with this car when it was stock was the shit ass brakes and it was wayy wayy wayy too soft in the front.
With just the s12 coilover swap it was like night and day. when the LCA's and swaybar went on the car became nearly a razorblade. My rear shocks were pretty dead so putting good racing rear shocks on it killed any weirdness out of the back.