68 L 78 SMOG

[spikeyz0]

What color was the insert in the persure valve on top of the smog pump its a 68 L78 4 speed 06B BUILD

[USER-3965175]

Early 1968 396 used 7801660 - green colored pressure setting plug

Later 1968 396 used 7801659 - black colored pressure setting plug

USER-3965175

[spikeyz0]

what would be correct for my car

[JohnZ]

what would be correct for my car

06B would be "late" - black plug.