Question about 383 / A-Body

The larger T-bars are nice when you drive down the road. At the track, leave the /6 bars in there. There not alot of money these days and will slip in and out easy, once you get past the first OE set.

With the 8-3/4 rear end, you'll just need to shorten the drive shaft.

You'll need a big block tranny. The cooler lines should be real close to a bolt up and go. An additinal cooler is a very good idea by the way. The headers at the above site have a very good rep.
I see no reason to deleate the brake booster. I do beileve there not in the way onec the engine is in.