[VintageMusclecar]

Hoping someone here can answer these questions.

Oil pans: Am I correct in understanding that as long as the pan "looks" reasonably like a factory pan, it is legal? Are there any restrictions as to sump length or depth in relation to OE specs? (I know kicked-out pans are an obvious no-go)

Fasteners, specifically cylinder heads: Are OEM fasteners a must, or can aftermarket bolts or head studs be used?

Harmonic dampers: Do they have to be OE diameter?

Thanks.
Eric