casting numbers

[Iroc-z86]

10066036...350...........2 or 4...Target Master/Goodwrench crate motor, 2-piece rear seal,
"Hecho en Mexico"

That is the motor in my iroc, does anyone know anything more about it? ie heads, timing mark placement, compression?

anything is greatly appreciated. thanks

[Tru2Chevy]

who knows what heads are on it.....yank a valve cover and check the casting number on them too

- Justin