Sorry to wake this post from the dead, but I am interested in what ended up being the issue.  I am having similar problems, happened recently after discovering a fuel leak, I think I fixed the leak, but now I am having hesitation so bad that I have to feather the gas, then get it to rev up to about 4k then slip the clutch to take off, or it will die. I have a new coil, plugs, wires, dist cap, rotor, fuel filter and others.  Funny thing is, when I first bought the sammy a couple weeks ago, it did the same thing, but after giving a broad tuneup, went away.  Now its back.  Im lost, I thought maybe there was air in the gas or something, Im not sure, any help would be appreciated.

Thanks

Check the keyway on the crankshaft pulley.

I been searching, lots of threads about how to fix the keyway issue, but I cant find any to show me how to check and see if thats the prob.  I looked at the pulley, its tight and wobble free, I started the engine and it rotates straight, no play. Dont know if that means anything.  and it was running fine today.

When it was running bad, it started perfectly, you have to give it some gas if it hasnt been started that day and feather the gas for a couple seconds to keep it running(only if it hadnt been started that day), then it idles and stays there. You put your foot on the gas and right when the petal is pushed down it runs into a wall and stumbles, if you feather it a bit, it comes out of it and runs perfectly, revs right up and runs smooth as ever.

If you put your foot in the gas it tries to die, I never let it die, so I dont know if it pulls out of it or not.
It ran like this when I first bought it, I gave it a full tune up and it went away, then I found the fuel leak, I fixed the leak and changed the filter, and its back. Drove it all day today, back to working fine. weird, could I have got some air/dirt in my fuel line that worked its way through, or am I just being optimistic?

Anyone know? Its running fine now, but I want to check, if its the key I wanna fix it before its toast.

One way to check the key-way issue without even tearing it down. Get a timing light set up and make sure that the timing stays consistent.

I had the key-way thing happen to me in my 16 valve. When I finally figured out what was going on, the timing jumped around all over the place.

def alternator check output batteries have memory if they are good and will start and run ya for a whiloe again

Thats funny, the alternator went out awhile back, I replaced it and its been fine.