70 340 block/ 73 crank and balancer

The pulleys you want would be off any 318/340/360 from 70 up till like 78 or so. The balancer has nothing to do with your pulley setup. Look up member "whitepunkonnitro" on this site, send him a PM, and he can hook you up with all the pulleys, brackets, spacers ect at one shot! Not expensive that way either.

I bought a set from him. It was for a 70 340. Did not work. He said I must have a 73 harmonic balancer. I thought the balancer might be longer.