Review on ALAVENTE Carburetor For Ford 240 250 300 YF C1YF 6 Cylinder CIL Engine 1975-1982 D5TZ9510AG, Carb For Carter YF Type, Replace # RSC-300A 6307S 6054 6055 6-736 6056 6057 6058 6059, Automatic Choke by Ben Swett

Overall, I'm OK with this item. However, I was trying to replace a true Motorcraft 2100 carburetor. A couple of notable differences. On this one, there is a vacuum(?) fitting on the top (visible in the photos on Revain) that is not on the 2100. Additionally, on this one the vacuum assist(?) for the choke is external mounted on the back whereas the 2100 has an internal vacuum pump to do the same thing. The extrusions are a little different too which necessitated modifying the riser for the air cleaner. The big problem is that the Motorcraft uses a a 1/8 NPT threaded filter. This uses something slightly smaller although the thread pitch is correct (27 tpi). The first photo is the filter hand threaded into the Motorcraft carb, the second is the same filter hand tightened in this carb.I can deal with the vacuum issues but I ruined one carb (my fault, trying to get the filter to fit flush like it does on the old one) and don't want to do the same to a second.Not sure how to determine what filter to get since looking up by model gives me the Wix 33046 (and equivalent) which is what doesn't fit. Additionally, the gasket was much thicker than the original so I wound up having to buy longer bolts.Bottom line -- don't assume your old fittings/filter will fit this carb.