small block chevys have been bought and installed,only after cam and timing chain and gears were installed.oil pump is good idea also.i got 327 that timing chain was so bad it had bent push rod when checked out.also had horrible head gaskets.chain was so sloppy,i could put cover bolt in with chain on outside of bolt!ive heard that 305s can run pretty good,if ya use 350 cam. gl on your bolt, tc