There are two different versions of both of those carbs, the early 8896 and 9375 versus the newer 8896-2or-3 HP and the 9375-2 or -3 HP and now possibly a newer 8896HP Ultra and 9375HP Ultra I have had, ran and tested both of the early 8896 and the 9375 non HP carbs.with stock jetting and squirters on Skips Duster at LACR, the 9375 was quicker and faster than the 8896 was by less than a tenth, .010, mayby .080 + or - .001 and close to one MPH I have two of the early 9375 and one 9375-3 HP, there is a lot of differences in the stock jetting and some others parts also, the early 9375 made more power on my 518 than the 9375-3 did with stock jetting on the local dyno here in central OR on back to bacb A-B-A testing Not a bunch but around 8 to 10 hp if I'm remembering correctly. I have had my hands on and dyno tested and used at the track several (5 or 6 different ones) stock 9375 non HP and they all where real close on HP on the dyno, maybe 2 to 3 HP max differences, and at the track, .01 to .03 max on back to back runs at the track. Not so on any of the other 1050 dominators that I have tested at the track or on the dyno Same results on several high dollar custom built 1050 Dominators also