I also run a 351W up front with a solid Ford 9" in the rear.
In an effort to facilitate getting my car completed, I simply had the stock (non-limited slip) third member rebuilt by a local shop.
I purchased the rebuild set and new gears from Summit Racing.
I decided on a 3.50 gear set. I have a 5 speed T5 Tremec.
The results:
Off the line I can smoke em almost forever. The car stays relatively straight with very little deviation. If I intentionally leave a short strip of rubber, they are equal in length. This tells me, that as long as my car is pointed straight ahead, a limited slip would do me little benefit. However, if I were racing and expecting to translate as much horsepower to the road whilst in a turn, I'm confident a limited slip differential would be well suited.
My only regret, in retrospect, given my engine and tranny combo, I should have used a 3.73 or possibly a 3.90 gear set.
That's OK, it gives me something to do next summer.
