I have a Crane NOS kit for a flathead but can’t remember the number. I will check in the morning if it’s a 388. If so I can copy cam card for you. Cheers.
Measure the lift, that takes about 10 seconds with a digital caliper then if it's 330 or less it a short duration cam 350 mediun 375 or more long duration. this isn't 100%, but will givr you some idea what you have