Let's see.... Chevelle, Camaro and Nova SS models had them.... Dodge Charger R/T had those... The BOSS 429 Pony had them.. And the AMC AMX had them also.... I'm sure I missed a few...
I've done it..... Just cut up small bits with a sprue cutter and pour in a 1/2 oz bottle.... Then add enough lacquer thinner till it turns into a paste.... It could be used as a styrene filler.... It's best to use the same sprue from the kit your working with....