The answer will depend on what 19b4 and h6 are.
your h6 has a timing chain
Porsche H6 means Porsche Flat-6 Cylinder Engine
Formula: I-
H2S
Benzene
H6 tolerance for 95 mm hole is +0.022/0
The formula is CCl4
m/v
( H6 ) - is a 3.73 limited slip differential on a Ford truck / SUV
Benzene
( H6 ) - is a 3.73 limited slip differential on a Ford truck / SUV