I am thinking that there are 5 hoods for a 70:

Flat - No vents
Flat - With vents
Domed - No vents
Domed - With vents
OAI - fiberglass

Comments?

 

You're thinking of the 1972 model year. 1970 had P/N 404555 flat (Supremes, F-85s, more doors, and wagons), P/N 404556 double hump (Cutlass S, 442), and P/N 406539 O.A.I. Yes, I am ignoring the minor differences in piercing for trim or emblems. FYI, in Jan 1972, list price on the O.A.I. hood was $257.95.

 

$258 in 1972 was a lot. I what they actually would have sold for?