i have a 650 (i think 4150) holley carb. it is in desperate need of a rebuild, but the car runs real rich even tuned as far as possible. i need to decrease the jet size. anyone have experience with jet sizes, that maybe could lend me advice on what size to start from. i have access to a dyno, but it is very expensive, 100 bucks for two runs, and would like to avoid all that cost. thanks guys.
------------------
12.54 @ 110.90
1.62 60'
best with old car, will let you know once i finish the transfer to the new to me car
I have pictures now, and here are the specs