Engines still need choke at startup and warmup, even at 70 degrees. 10" of vacuum is pretty low, indicating a non-stock cam or problem with carbs, timing, or ?
You'll be surprised at how the choke will eliminate stumbling on warmup.
__________________
BONESTOCK GOATS
'64 GTO Tripower Hardtop (Wife's Car)
'64 GTO Tripower Post Coupe (My Car)
'99 Bonneville SE Sedan
|