Holley 3310 jetting for 360

The carb is 3310-11. It has a block in front and plate in back. It is totally stock from Holley. The timing is about 20deg. and vacuum is around 10 in. in drive at around 900rpm. The MP electronic dist. has about 14 mech. all in around 2500rpm. I believe the factory pri. jets are 70 with a sec.plate of 134-21(whatever that is).