69 Mach1 Original 351v4 w/ AFR185/55, Comp Cam 35-421-8, RPM , roller lifters/rockers, 4r70w, 3.25
That was what I was working on this weekend. Mine had neither. I imagine the white plastic is some kind or door unlocked warning feature. The other is hard to see what it’s attached to. I don’t have it but it may be related to the other feature.