Please help what is the thickness of a factory harmonic balancer

[73charger440]

I'm having really bad alignment pulley issues I've bought a new set of bullet aluminum pulleys and the crank is 5/8" outfurther then the water pump. I bought some spacer but 5/8 is way to far to space the water pump pulley. I'm thinking the after market summit racing harmonic balancer is thicker so if anyone can tell me what the factory thickness of a a stock forged crank harmonic balancer is ?