Just an FYI for any of you who have been cussing and discussing your 4 bbl on your 235/261. Have finally got the carburation adjusted on my 261 bored .60/shaved .20/Clifford 6=8 intake/Fentons. The 390 is mounted backwards to keep original gas pedal and linkage, .60 primary jets, .65 drilled secondaries, purple secondary spring, vacuum reading 18. Running like a scalded cat.
