help with alternator clearance requesting motor pics 67 327

[gmc1971harwich]

ive got a 71 gmc originally 307.i was wondering if anybody else is having issues with this. The motor thats in my truck is a 327 from a chevrolet impala. its got stock heads. stock 62 amp alternator (mounts on drivers side), headers, aftermarket lower alt. mount and it sucks. the mount lines up with the pulleys but i cant mount the alternator right because the edelbrock valve covers are too tall. I cant get the alt far enough cause the valve covers are in the way. I run these valve covers because im using edelbrock performer roller rockers that require taller covers. it may sound confusing but il try and get you pics tonight. its a really frustrating situation can i see some pics of a 1967 327 stock heads with headers, roller rockers, and how u mount the alt. thanks