the timing cannot be off a tooth if it runs and he can set the timing. you need to verify operation of both vacum and mechanical advance mechanisms. 13 inchs of vacum is alittle low but ok. the valves may need to be adjusted. but i would worry less about them and more about getting it up to 2000 rpm and hold it there for 20 minutes to break in the cam. engines can smell and sound funny when breaking in. they can run hotter than normal also. tom