Thanks guys for your responses. I meant if I could push them up from
the bottom.

Long story short as to why I took the head out is because I was leaking
coolant into the engine (somewhere) as I was burning it. In addition
when I'm driving and stop at a light, for instance, when I try to get
going is like it has no power to get going. I accelerate and it just
goes very, very slow. I thought I had a blown head gasket, but now that
I took the head out the head the gasket actually looks OK, so now I'm
thinking I may have a broken ring or something like that which is
making me lose compression thus the slow power. Since I already went
through the trouble of taking the head out I thought if I could do it
without taking the whole engine out I might as well take out the
pistons and inspect/replace the rings.