We switched my 1968 Bronco 170 from solid to hydraulic lifters. It seems ok but we still have missing issues with this engine. I have tried everything and changing lifters was my last ditch effort to get it to smooth out. I got rid of the sparkamatic stuff, put a conventional distributor on. Some times it runs pretty good, but seems when it warms up it starts missing. Any thoughts appreciated. P.S. after the change I had a guy tell me there’s no oil port in a solid lifter engine, therefor the hydraulics won’t work??