So I was in the same boat, bought a crate motor that had no drive accessories. Didnt want all the fancy billet or overpriced kits. I found a Chevrolet kit that is a direct fit for the motor I bought. Its all new or re-manufactured components.
https://www.summitracing.com/parts/nal-19369257
You could also parts pull it, but since I was wanting in all new drivetrain, didnt want used parts.
IMG_3730 by
Drew Bush, on Flickr
IMG_3731 by
Drew Bush, on Flickr