The SPID paint codes would be:
528 Dark Bronze body, Solid paint
552 Conventional Two-Tone, 528 Dark Bronze body with 521 White roof
583 Special Two-Tone, 528 Dark Bronze body with 521 White roof and rockers
http://paintref.com/cgi-bin/colorcod...=50&size=large
The only truck I have good pictures of has been repainted in what I believe is the original color just not correctly nor to the SPID. But here you are a former 583 Special Two-Tone GMC with a 625 gold vinyl interior. As a note 70 trucks did not have a parchment interior option but instead offered a darker ivory/gold color shown here.