I need a parts expert please

Anyone know if there's a dime store dist cap that will fit a MSD pro billet dist. I need to phase my dist rotor for the FiTech on my 340. Can't bring myself to drill a hole in a $50+ cap. I'd like to know what Chevy year/engine would replace this cap just for the phasing process. Not up on all my Chevy stuff.
thanks Larry

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