360 instal, going on 3 days, need help

In case I missed something, is the crank drilled for a pilot bushing or are you using a roller bearing as I am? I've heard that if the crank is not drilled for a factory pilot bushing the input shaft needs to be trimmed about 1/2" to 3/4". The later engines used a roller bearing that fit into the torque converter hub as the cranks were not drilled through.