340 Oil Priming Question First Start
According to my trusty 1979 Isky catalog, the hydraulic lifter pushrod is 7.265 and the solid lifter pushrods should measure 7.531 so I was close when I said 7.500. What's .031 on the internet??? LOL
You should be able to measure what you have and figure what you have.
That's basically a 1/4 inch difference.