That originally had the 9 1/4" and a 10" would fit. A dual disc would be great for it. Best would be the orig. type 340 10.5" but room and some fabrication is involved. Make sure the flywheel has no heat spots on it. If it does it has to be replaced because if you have it machined it will look good but just for a minute. They will come back and it will chatter. If you have to replace the flywheel you might as well look for a 340 bellhousing and use the 10.5" I used to use the 10" a lot as it was lighter but I replaced the clutch assy. a lot, I mean a LOT! But I always had a lift available to me and a clutch rebuilder 2 miles away. And they were reasonable back then. I've thought about using a hyd. set up on my next one but never have done one yet. It should solve a lot of issues with fitment. Maybe someone on this site has done it so they might give you some insight on it. I just love those 340's in the early A-bodies.
