Get a Toyota and be done with this minuki BS, nahh just messing with you. I ran for the longest time on the stock minuki, i had issues like you had and it would run so rich it would foul my number 3 plug if I floored it. I switched to a weber and it solved alot of issues, when I threw a rod in my Mighty Max I was loaned a 1984 Toyota (About to me mine in a few months) and I had the same issues, so i slapped the weber from the Max on there and it is awesome now. I got a second Weber for $20 from the scrapyard, you just got to look around on vehicles besides a mighty max, granted you will need an adapter ($40 on ebay). But since you are working with stock why don't you try some gasket sealer on the base gasket, I had a little vacuum leak with my weber and that fixed it (Its actually recommended to do that)