I bought this to replace the carb on my 1960 International Harvester B110 truck. The old one on the 266 v8 had a broken throttle plate and needed a rebuild in the worst way so I figured I should just buy a new one. Puting it on was pretty easy; the only issue there was is that the fuel line and choke cable inpute are on the other side compaired to the older 2300 models. As for tuning, the idle mixture seemed to be spot on, the only thing I adjusted was the float level, it was a bit low. The carb runns great, I expected it to be way too rich for for my 266 but it turned out to be perfect at 44ft above sea level. If you have heat issues, you may want to swing by Napa and buy a thicker mounting gasket with a bowl heat sheild as the one that comes in the box is paper thin.