Crank pulleys will not bolt to balancer

Looking at the the 273 set up with the tab bolted to the bottom of the water pump, if I went the route of the 273 balancer that still leaves timing much to extrapolation as the 273 tab will also be no where near where desired timing will be?

If you don't have a dial back timing light, just put timing tape on the balancer, it will have the advanced degrees.