picked up a camaro with a 455 has stock distributor 20,000volts want to put a 65,000 volts any thing I need to do before doing that.
I would think about fundamental electric principles first. The air gap across the plug gap is the resistance. When the electric potential across that gap is say 25,ooo volts the plug fires because the gas is ionized. For this reason the electric potential across the plug will never rise to 65,000 volts. The marketing departments of some manufacturers like to attract customers by throwing around larger voltage numbers. They assume the larger the number touted the more many customers will assume that there is a corresponding increase in performance. If I were you, I would get a Lectric Limited conversion from Todd on this Board and a MSD box. You will have all the performance that you need to fire the plug (and multi strike at low rpm) which is all that matters.
You aren't supplying enough information. Are you replacing the entire distributor, or just the coil? Like Jim said, manufacturers are really good at hyping their products that do absolutely nothing for performance. Since the last Buick 455 was made in 1976, and now the one you have is in a Camaro, I can pretty much guaranty that the distributor isn't the stock one. Is it a points distributor or a big cap GM HEI?
