Sbc 350 5.7l engine block casting # 14063938. Would like to know most important for me the year of production. Was told it is a vortex motor. I thought those motors are '96-'2002 were they manufactured in any other years? Need to know as for referencing parts order. Thank You for any info or suggestions. I am in the process of installing to a '78 Chevy c10 sidestep.