I doubt you'll see any difference going from a 52 to a 51 jet. A 35 nozzel is pretty big, though.
Top end would be more on the spring selection you have for the secondary. The primaries can only do so much. I think that's where you need to play next. For me the second weakest spring is the one that works best. Secondary spring kits are cheap. If you really want to play around with it Holley makes a quick change kit for the secondary spring that you might find useful.
Sounds like you have the primaries sorted out. Time to go and play with the secondaries.
Last edited by gbauer; 04/25/16 11:09 AM.
