WHAT DOES 4AGE 20V BLACKTOP MEAN?

Cant don't forget just what the B is, but TDC is Top rated DEAD CENTRE for for timing. All 20V's, regardless of whether at the Coastline or highveld should have a btdc of ten deg. Meaning your inventory timing must be established at ten.Thanks greatly, i apologize for not clarifying the mods. I'll reset the TB linkage given that i havent adjusted i