Engine in test stand

Thanks, exactly what I was thinking.
I have my reciprocating assembly balanced with it on there.

I figured it was for a simple break in / try out run for oil leak inspection.

Prob ran it for 6+ hours total time on the stand. Cam break in, without and with inner springs installed. that was a couple hours of the run time.
The rest was just for fun and most of the neighborhood enjoyed it :mob::poke::steering::lol: