Wanting 8 sec passes, will need at least 700 hp, no probs getting that, the r230 will def handle that, the cv's as fitted to road cars could be weak points, the later r34 or 35 cv's will go close, or, get customs made?
Other main issue is flex in the rear bushes, replace the rubber with machined Delrin(harder than nylon) to get some adjustability, offsett drill the centre holes, machine a pair of opposing flats on outer edge flanges to get say a BIG spanner on, back off clamps, spin bush, rear end toe gets adjusted etc.
To reduce rear end squat, look to get offsett strut tops ,ade to stand rear struts more upright, this reduces tendency to go neg camber under hard. You'll need wheelie bars.
Higher 60 foot times equals harder launch eqals more strain on rear end, maybe go for less 60 foot but nail it for top end!
At 9 seconds you need a cage?? I think, coming back to a live axle, you could cut through the floor and run some barring between centre cage legs, with bracing, and vertical tabs to then mount the forward links for a live axle.
I have a RX7 sports sedan that jas exactly that, however it runs very wide track with flares, so the forward links run into the main cage hoop legs, the tabs are multi holed for adjustability, it is usual sporys sedan practice. I'd be thinking you will be running inner tubbed rear end and external stock rear guards?
The draggers in Japan run at 1/4 mile strips up in the hills very remote, hard to find, they stock body, maybe a small flare, but the quick ones ie the 9's are using live rear ends. I have some pics, somewhere, showing some of their setup, crazy little buggers!
