This kit covers the 283 and 327 V8 engines available in the 64-67 Nova. (except L79 327/350HP version)  Kit contains: PCV tower, special long attaching bolt, bolt fiber washer & steel washer, and o-ring to seal the tower to the block.  For 283/195HP, 283/220HP, 327/250HP & 327/300HP engines. Will work for other model GM's as well.