[Gaz64]

Jim,

You have dropped your idle jet from 70 to 55 in one hit?

Way too much percentage change.

A 55 jet is 62% of a 70 jet.

Obviously a 70 was rich, a 55 is lean. A 60 to 65 is what you need for fuel.

So get a number drill set and drill your 55s to #74 and work up, until you find your driveability is acceptable, watch your A/F meter while tuning.