Anyone know if the Isky Red Zone 3472-RH-EZX roller lifters use 3/8 or 5/16 pushrods?

There probally 3/8 like most solid roller lifters cups out there, call Isky and ask them. 323-770-0930

They weren't open when I posted and I wasn't sure when Smith Brother Pushrods asked me when I called them with my order this morning. The pushrod length checker uses a 5/16 ball.

I did call Isky once they opened and they said either 3/8 or 5/16 will work, didn't matter to them or the lifter.

I also texted an local engine builder that builds a lot of bracket/Super Class motors locally and he said to use the 5/16 ball. (he's who I bought the lifters from)

So I called Smith Brothers back and they will be ready to ship today and will be at my house Thursday. I have always had good experiences with Smith Brothers.

3/8" pushrods with .120 wall, 5/16 cup and 5/16 ball
10 at 9.660"
10 at 9.625"

Smith Bros. has given me several of the pushrod ball and cup checking tools they use and have I have a new set of the Isky Red Zone solid roller lifters in my motor now, I'm sure they have a 3/8 cup in them just like the Crowers and Cranes have.Terry Manton told me to use the proper size on both ends to make sure they match, using a 5/16 ball in a 3/8 cup will work but you don't get the full benefit of the 3/8 cup for load distribution He had said do not use a 3/8 ball in a 5/16 cup Same thing on the other ends, keep 5/16 with 5/16 and 3/8 with 3/8