Detroit Iron Books and Service Manuals?

[Modaddio]

Any builders/novices/noob have experience with Detroit Iron Books?

I'm looking for a bit more detail than what I have in my shop service manual. The exploded views are ok but there's too much "revelle" arrows that are confusing for me. Being new to restoration and rebuilding, I'm not able to deduce the obvious.

1. RocKAuto has in the literature section a few books for the 72 C10.
2. Detroit Iron has a CD for $50 that has the following.
1972 Chevrolet Truck Chassis Service Manual (Series 10 thru 30)
1972 Chevrolet Chassis Overhaul Manual (Cars / Truck Series 10 thru 30)
1965-1972 Chevrolet Parts Catalog System Manual
1972 Chevy Truck Sales Brochures

Just trying to get additional info before getting another useless manual. Opinions are welcomed

R