'75 3.6 conversation suspension questions

[Duc Hunter]

So my new project car is a 1975 widebody with a 3.6 from a 1994. It has the original suspension on it from the looks of it. It will be a street car, purely, yet I would like a little more sporty ride. I also would like to improve the balance of that car front to back. I know the new more weighs more (about 75-100lbs?) than the old one. I also know the 911 is alaready (obviously) and understeery car. I know a popular street setup is 21/28 or 22/29 on the torsion bars.

A few people locally who are very familiar with these cars have suggested running Billstien sports up front and HD's out back to help with this too, and help the rear shocks work with a stiffer bar. They did know know how much stiffer to go on the rear, but thought is a 21/28 is a good setup for a non-conversation car that I might want to go 21/31. Others have suggested I leave the front bars alone (and sway bar), and upgrade the torsion bars, sway bars, and go to an HD shock in back. They all say my car, with the extra weight out back, will want to sway at a lot, and ther push out of corners. They say 911's need rear support anyway and mine does even more so.

So my question is if I was going to upgrade the suspensions hitch bars would the experts here suggest given that my car is more tail heavy than a normal 75 to recover some balance.....knowing it is s a street car?

[umgang]

i have a 1975 911s w/ 3.6 L.
The stock suspension is too soft. Weight difference is only 45 lbs from stock motor, but the additional hp and tq overwhelm the stock suspension.
Eventually you will figure out you are under braked too.
Gotta get the car back to where the engine performance, suspension, and brakes are all working together as they did when it was a 2.7.
31mm will be way too stiff in the rear for a street car.
Talk to some knowledgable people who have built and set up 3.6 conversions, like Steve Weiner/ Rennsport Systems on this board.
Nothing worse than bad advice and an unbalanced car.
good luck

[Flieger]

Everybody has their own taste in torsion bars. I use 22/31 with a stripped out early car. I'd say that would be fine for yours but YMMV.