I think the correct part number for 70 hood hinge springs is 546325. 69-70 546325 have 29 coils, 1 7/16 (1.34" - 1.43") outside diameter, 1/4 inch rod size, and measure 9 1/2 inches.
I compared these measurements to a couple sets of 70 only hinge springs and they were the same.
Ames sells a set that is very close in measure with 30 coils (If I'm counting them correctly).
I think 3848272 is 1967-1969 camaro hinges 28 Coils 9 3/8" long.
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