This is a link to a thread on ImpalaSSforum.com regarding putting a T56 in fullsize GM b-bodies..... Impala SS and my Buick Roadmaster Wagon.
It was started in 2003 , but it is a sticky because much if not all of the information still applies today.
http://www.impalassforum.com/vBulletin/ ... p?t=100037
Its a long thread but has some good general information in it as well as the specific B-body stuff.
I found this post of particular interest as this is probably the set up I will go with in both my H-bodies and my Roadmaster (it is post # 6 and is posted by wood95SS ). Also please bear in mind the F-body stuff he is referring to is '94-97 :
".........Clutch system: I've stated this before, but because of what the intent of this thread is, I'll say it again.
The F-body uses a pull-style pressure plate. The pressure plate has an integal throwout bearing attached to diaphragm. This is why the F-body pressure plate is so much more expensive than a conventional push-style pressure plate. Personally I have no experience with the F-body clutch; in fact I'd never heard of a pull-style pressure plate - was the old style broke?
The reason for my research into alternative clutch systems was because I have FLP long tube headers - and the left one likes to occupy the same space as the GM external slave cylinder. Cut up the header? Not no, but heck no. Plan B: conventional push-style clutch with compatible actuation system.
Enter McLeod: McLeod offers a replacement master cylinder for the F-body system. This is an all metal, 13/16" diameter cylinder with an articulated input rod and adjustable spherical ball rod end fitting (heim joint). P/N is 139001 for the LS1 F-body, for about $200 from Thunder Racing, and will bolt right in to the clutch pedal bracket as a replacement for the GM master. The McLeod master also has a higher fluid volume output which may help T-56er's having problems entering reverse due to a clutch that won't fully release.
For the slave and throwout bearing McLeod makes a slip-on/over-the-snout slave actuator with integral throwout bearing. This slave literally slips over the T56 input shaft and remains sandwiched between the pressure plate and transmission (read: no throw out fork required) within the bell housing. It also incorporates a bleed line for system bleeding (I'll bet this got your attention) and an internal adjustment collar which is used to move the slave closer to the pressure plate if needed. The slave is all metal, and rebuildable (o-rings). The actual throwout bearing also slips onto the slave cylinder and it too is replaceable. This slave has a stoke of ~ 0.650"; you need about 0.250" to release a clutch disk.
Conventional clutch came from SPEC in Birmingham, Alabama. ~$350 for flywheel resurface, pressure plate, and Stage II disc from these folks.
Clutch has tremendous grip. Release system has given me ZERO problems since installation. Both master and slave are all metal parts and are rebuildable.
Conventional clutch pressure plate isn't as expensive as the F-body unit - and that was enough to go 'conventional' in that I intend to keep the car and go thru a couple clutches in the coming years, and won't get gouged for that GM stoke of genius.
If you are curious, go to the McLeod website and take a look at their online catalog. They show a nice picture of the hydraulic slave cylinder, See 'slip-on' bearings vice bolt-on ones..........."