I know this is an old thread, but we also make bolt-in aluminum radiators for these trucks, that are hand-made right here in the USA, with no plastic / epoxy. We are a Gold Vendor here as well. We also offer discounts for forum members, and you can take a look at our website here:
http://rndfabrication.com/C10early.html
This is a downflow style we made, and we can make them for any engine combo (no price increase), and transmission coolers are included at no additional cost:
