Yeah, but you can swap in the solid lifter, push rod, and rocker arm to measure cam timing and piston to valve clearance on cylinder #1 and then put the proper parts back on....
It's only temporary to check, not leave in permanently...
I suppose that would work if you're extra careful about the difference in length between the two types, just use a longer pushrod? I guess that would be easy to tell if the length is off too because there would be too much or too little lash...
