As someone that owns a '70 LS6 that is Forest Green with saddle buckets, I would say leave the interior alone. I think the contrasting interior really makes the cars stand out. I've always enjoyed interiors other than black such as red, pearl, or saddle. BTW..since we are on the subject of color combos what are you guys favorites? Here are mine:

1) dk green/saddle
2) red/red
3) red/white
4) silver/black
5) black/red