I have read that lighter colours like yellow or red look best over a white or light grey primer. Not sure if darker green needs anything specific.
I think the most important thing would be to have one uniform primer colour (think sealer) before painting.
From a practical perspective, if you want to use the 3M black dry guide coat you can't use black primer...they do make a white dry coat coat though, I assume it works the same.
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Michael
Oshawa built 1 option Judge basket case. 463, SD KRE 295's, CNC'd factory intake, Cliff's Qjet, Stump Puller HR cam, RARE RA manifolds, Pypes exhaust, T56 Magnum, McLeod RXT clutch, 3.42 12 bolt. 24 year project almost done... 
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