It originally came with a 305 according to the title however i do not think its the original motor. Only numbers i seen on motor were 18436572 Can anyone figure it out just by those numbers? I have people telling me its a 305 and others saying a 350!? Im thinking its a 305 personally.

 

Also if u cannot tell by those numbers where would i find the right numbers for you to be able to find out?

 

You found those numbers on the intake manifold, and they are your engines firing order.
Look on the block, drivers side near the bellhousing for the casting #. That will tell you what the engine might be. Near the casting #, or in the same place on the passenger side will be the date code. And the numbers stamped on a pad in front of the passenger side head will tell the rest.
http://www.chevy-camaro.com/chevy-ca...oding-help.asp