I started with 150lb rate. I have no idea what the stock 1200 spring rate is....I think bolt on sleeve should holding in place if not I just weld on it.....I still don't know the ride height until install it

i was using 250p springs in my setup..
it was very good for the track but a bit too firm for the street.. u could go a little firmer but with an a series motor it should be ok..

most likely u will find the spring platform at the bottom of the strut on the first big pothole u hit...
i had this happen when i was advised that 4 grubscrews and a bit of locktite will be sufficient.. This was from a engineer too.
i ended up welding a collar on the strut..
have a look at the first pic in the suspension section of the photo gallery.. i made this backyard strut years ago when i was still 19..

I used steel threaded sleeves so i could weld mine to teh strut. how can you weld alloy to steel?

Ive gone for 275lb springs but ive got the L-series so should be ok. I like the 280zx strut, ive been amazed how much more room you get in the wheel well compared to the stanza gear.

hi im really interested in doing that same conversion to my sedan. could you give me some pointers, problems you encountered and prices? i would really appreciate it
thanks