Kasey, Mopar made two different styles of solid and hydrailic lifters, pre 1967 and post 1967, the bodys where different and the cup sizes, 1/4 instead of 5/16 like the later ones,where different as well as the cup placement in the lifters. You can use either one of them in any Mopar V8 block as long as you get the proper pushrod end size and lengths to match what you need
Don't forget that the ceraminc lifters are very delicate, the bottoms shatter if bounced, usually ruining the motor before you can shut it off
