cj-ing-rj, not sure what you decided to go with.
I had a similar situation. YF on my 78 was horrible, leaking fuel. I looked long and hard at all the options. After hours of discussion, I ended up talking to the owner of a jeep shop here. He swore by the 350cfm Holley 2bbl. Said he'd been putting them on jeeps since the late 80s. I got a chance to see 2 of the jeeps he put them on (ride along and talks with their owners.) Their owners loved them. One of the guys replaced a Weber with the Holley.
Long story short. I bought a 2bbl intake off ebay, got the Holley and took it to the shop to get set up.
I love it. Runs like a scalded dog. Idle's in the right RPM range and since I got it done (2 months ago) the jeep has fired up first time every time. I've got a manual choke, but I've yet to use it even on the cool 30 degree mornings.
Cost a little more than a rebuild but I've got piece of mind. I got tired of playing games with tuning the YF.