Hot Rods flathead clutch problem

I have a 29 ford roadster with a 8ba 50 merc. and 51 merc half bellhousing with the clutch shaft using the large throwout bearing. im using a late 60s ford 4 speed fitted with speedways adapter on mainshaft to run the large bearing. my problem is clutch wont release, the fingers hit the disc.its also a 60s ford disc.has anyone ever run this combo merc. to ford fourspeed trans. ? what clutch plate & hat do I need. any help is appreciated.

 

"the fingers hit the disc" Can you explain this more?
Got a picture? Need more info, but sounds like the wrong pressure plate.

 

You probably have a pressure plate from an 8BA made for the small throwout.
The fingers are too long if so...you need an early Ford '35-48 pressure plate (various diameters exist) or '49-50 merc.
That suggestion raises a BUNCH of issues because Merc pressure plate require merc bolt pattern and the '49-50 ones are rare now.
Ford wheels are mostly for 10 1/2 PP, which does not exist in early Ford finger length, or they are for the 11" truck clutch which gives you an easy solution but a lot of weight.
Somewhere I have a post listing out the numerous late flathead clutch solutions
If you have the rare 10" 8BA wheel (taxi, police), no sweat...'46-8 For clutch parts all fit
common 10 1/2 can apparently be custom rebuilt with short fingers
Merc wheel (even spaced hole) needs 49-50 PP, '51-3 used long fingers

 

The nose of your input shaft is pressed up against the end of the crank inside the pilot hole. You need to cut about 1/8" off the end of your input shaft. Ask me how I know......... I drilled the flywheel to accept an 11" clutch and pressure plate from a 1985 F-150. I had trouble finding a clutch disc that would fit the transmission and also fit with the pressure plate. So, it was easier to drill some holes.

 

thx,ill look into that.

 

love to see that post.

 

yes it was the wrong pressure plate,to close to the fingers.