I have a crate motor with this casting number
(10066036...350...........2 or 4...Target Master/Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico")

And these heads

(33417369...90-up...350..........Gen.I Goodwrench crate motor,
"Hecho en Mexico", 76cc)

Does anyone know What power this motor has. I just got this motor and putting it in my monte i jus don't know what the power it on this motor if someone can help me out it would help me alot.

Sounds like the one I have, basically a truck replacement motor.

Low compression, crappy cam power to about 3500 rpms, and crappy heads.

Heads and cam have been changed out of mine and it hauls now.

Rated at 249 hp with open headers, 4 bbl.

I'm not positive on the casting #s though.

Yup, pretty weak. Not much better than the stock L69 that was in there.

But, it's a 350, so it has as much potential as any other 350, except that it has dished pistons, so the CR will always be sort of low.