Strange Engine Number? Stupid tuning questions

Getting a slant to the 180 hp range is not difficult,

1) improve the ignition, go with an HEI module, that will also require a mopar electronic distributor.
2) you can get to your hp goals with a well tuned 2bbl. But a 4bb on an offy or Clifford would be a plus.
3) exhaust headers, Hooker long tubes, Clifford or AussieSpeed will help. The shorty Cliffords would probably be the best choice for your car, or possibly Dual Dutra’s.
4) you will want to upgrade the cam, many choices, Comp, Hughes,,,or have your existing cam reground.
5) stock rods are fine as are stock style pistons to get you to your power goal, if you over bore the cylinders, Silvolite are a good stock style piston.
6) you will want to mill the block and head to raise the compression to 8.5 to 1
7) a clean up of the cylinder head valve ports would help.
Look at the www.slantsix.org forum,
FABO is a good forum, but the slant six experts are at .org
They have a slant six engine build matrix that lists out what others have done on thier slant engine builds.