2 questions - Clutch Size and Speedo cable connection

I need to replace my clutch and was on 50resto looking for a good replacement.

Basically lookin for recommendation from this page. Either the RAM CLutch or the FMS "King Cobra or Heavy Duty".

http://www.latemodelrestoration.com/products.aspx?category=MCLUTCH6

Also I did my heater core install today. And while sliding the dash down, my speedo cable popped out. I was unintential and didnt sound right when it did so. Now I went to put it back with the dash and I couldnt make it pop back in. SO for now my speedo doesnt work. Anyone have any advice on how to pop the speed cable back in? It got cold and I have to drive the car so I had to put it back together. But I plan to revisit this, this weekend. Does the dash have to come back out?

Please help.
 
I ran the FMS King cobra clutch for over 2 years and they were a hard 2 years. Multiple 5000 rpm clutch drops on sticky tires and never had a problem from it. Never slipped and never chattered or anthing. Also had a decent pedal effort. Little stiffer than stock but not bad.
 
If you decide on Ford Racing, get the King Cobra, not the Heavy Duty. The King Cobra is a little lighter and stronger. Pedal effort is not that bad if you have a new cable and aftermarket quadrant.