Hi forum
Great to see this much activity on my post

Thanks for the positive feed back as well. I look forward to the day she is ready.
I had a look and I also have a rear sway bar wiso? It also looked rather original, mind you the suspension on mine is far from original. It does look original but who knows?
The discussion of suspension set up and the like is a big talking point in Japanese car mags and forums. I have a mate over in Japan at the moment and I regularly get him to send me mags and ask for help with translating certain articles and the like. This is a topic that is discussed a fair bit over there as well.
The snap oversteer issue was down to many characteristics with these cars. My understanding is that the combination of stiff suspension and general setup was the reason for the MK1a issue. The original AW11 had issues transferring its weight to the front of the car during braking and cornering. The combination of a mid ship power plant, stiff chassis and suspension all contributed. This is predominantly what let to its snap oversteering.
To try and resolve this Toyota softened up the suspension in the MK1b. With other suspension tweeks they mitigated the effect as there was much better weight transfer as a result. This however did lead to a bit more body roll.
My research then led me to many a interesting discussion in Japan. The consensus over there is if your after a cheap mod that retains some of the cars original characteristics (eg: ride hight, harshness, cornering feel, etc), go with the option I laid out above.
My understanding is that even though the later model suspension is designed to take the extra weight, the MK1a's stiffer suspension can also deal with the load. This then combined with the MK1b's softer suspension in the front helps with weight transfer and helps curb some of the body roll found in the stock MK1b. This setup does give the car a slight favour towards understeer. This however is better I feel for road use anyway.
I will admit that I am also a little sceptical of this setup, it seems to good to be true. Thats why I also have a set of AW11 SC rear struts and springs. That way if I see that the Mk1a parts aren't copping I can switch them out.
Ill keep the forum posted on my findings