When installing the American Autowire kit on the 66 C10, I bought a hydraulic crimp tool from HF. Came with a large assortment of bits for different wire sizes. Worked really well imo. Also had a nice manual crimping tool for use in area where the hydraulic tool was too bulky. Just an fyi.

1966 C-10 Short Stepside
HiPo
Step-by-step ~ and on-going resto build
in the Project Journals